text: const THREE = require('../../three.js');
  const fflate = require('../fflate.min.js');
  
  /**co
   * @author Kyle-Larson https://github.com/Kyle-Larson
   * @author Takahiro https://github.com/takahirox
   * @author Lewy Blue https://github.com/looeee
   *
   * Loader loads FBX file and generates Group representing FBX scene.
   * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
   * Versions lower than this may load but will probably have errors
   *
   * Needs Support:
   *  Morph normals / blend shape normals
   *
   * FBX format references:
   * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
   * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
   *
   * 	Binary format specification:
   *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
   */
  
  
  /**
   * Loader loads FBX file and generates Group representing FBX scene.
   * Requires FBX file to be >= 7.0 and in ASCII or >= 6400 in Binary format
   * Versions lower than this may load but will probably have errors
   *
   * Needs Support:
   *  Morph normals / blend shape normals
   *
   * FBX format references:
   * 	https://wiki.blender.org/index.php/User:Mont29/Foundation/FBX_File_Structure
   * 	http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_index_html (C++ SDK reference)
   *
   * 	Binary format specification:
   *		https://code.blender.org/2013/08/fbx-binary-file-format-specification/
   */
  
  
  THREE.FBXLoader = (function () {
  
  	var fbxTree;
  	var connections;
  	var sceneGraph;
  
  	function FBXLoader(manager) {
  
  		THREE.Loader.call(this, manager);
  
  	}
  
  	FBXLoader.prototype = Object.assign(Object.create(THREE.Loader.prototype), {
  
  		constructor: FBXLoader,
  
  		load: function (url, onLoad, onProgress, onError) {
  
  			var scope = this;
  
  			var path = (scope.path === '') ? THREE.LoaderUtils.extractUrlBase(url) : scope.path;
  
  			var loader = new THREE.FileLoader(this.manager);
  			loader.setPath(scope.path);
  			loader.setResponseType('arraybuffer');
  			loader.setRequestHeader(scope.requestHeader);
  			loader.setWithCredentials(scope.withCredentials);
  
  			loader.load(url, function (buffer) {
  
  				try {
  
  					onLoad(scope.parse(buffer, path));
  
  				} catch (e) {
  
  					if (onError) {
  
  						onError(e);
  
  					} else {
  
  						console.error(e);
  
  					}
  
  					scope.manager.itemError(url);
  
  				}
  
  			}, onProgress, onError);
  
  		},
  
  		parse: function (FBXBuffer, path) {
  
  			if (isFbxFormatBinary(FBXBuffer)) {
  
  				fbxTree = new BinaryParser().parse(FBXBuffer);
  
  			} else {
  
  				var FBXText = convertArrayBufferToString(FBXBuffer);
  
  				if (!isFbxFormatASCII(FBXText)) {
  
  					throw new Error('THREE.FBXLoader: Unknown format.');
  
  				}
  
  				if (getFbxVersion(FBXText) < 7000) {
  
  					throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + getFbxVersion(FBXText));
  
  				}
  
  				fbxTree = new TextParser().parse(FBXText);
  
  			}
  
  			// console.log( fbxTree );
  
  			var textureLoader = new THREE.TextureLoader(this.manager).setPath(this.resourcePath || path).setCrossOrigin(this.crossOrigin);
  
  			return new FBXTreeParser(textureLoader, this.manager).parse(fbxTree);
  
  		}
  
  	});
  
  	// Parse the FBXTree object returned by the BinaryParser or TextParser and return a THREE.Group
  	function FBXTreeParser(textureLoader, manager) {
  
  		this.textureLoader = textureLoader;
  		this.manager = manager;
  
  	}
  
  	FBXTreeParser.prototype = {
  
  		constructor: FBXTreeParser,
  
  		parse: function () {
  
  			connections = this.parseConnections();
  
  			var images = this.parseImages();
  			var textures = this.parseTextures(images);
  			var materials = this.parseMaterials(textures);
  			var deformers = this.parseDeformers();
  			var geometryMap = new GeometryParser().parse(deformers);
  
  			this.parseScene(deformers, geometryMap, materials);
  
  			return sceneGraph;
  
  		},
  
  		// Parses FBXTree.Connections which holds parent-child connections between objects (e.g. material -> texture, model->geometry )
  		// and details the connection type
  		parseConnections: function () {
  
  			var connectionMap = new Map();
  
  			if ('Connections' in fbxTree) {
  
  				var rawConnections = fbxTree.Connections.connections;
  
  				rawConnections.forEach(function (rawConnection) {
  
  					var fromID = rawConnection[0];
  					var toID = rawConnection[1];
  					var relationship = rawConnection[2];
  
  					if (!connectionMap.has(fromID)) {
  
  						connectionMap.set(fromID, {
  							parents: [],
  							children: []
  						});
  
  					}
  
  					var parentRelationship = { ID: toID, relationship: relationship };
  					connectionMap.get(fromID).parents.push(parentRelationship);
  
  					if (!connectionMap.has(toID)) {
  
  						connectionMap.set(toID, {
  							parents: [],
  							children: []
  						});
  
  					}
  
  					var childRelationship = { ID: fromID, relationship: relationship };
  					connectionMap.get(toID).children.push(childRelationship);
  
  				});
  
  			}
  
  			return connectionMap;
  
  		},
  
  		// Parse FBXTree.Objects.Video for embedded image data
  		// These images are connected to textures in FBXTree.Objects.Textures
  		// via FBXTree.Connections.
  		parseImages: function () {
  
  			var images = {};
  			var blobs = {};
  
  			if ('Video' in fbxTree.Objects) {
  
  				var videoNodes = fbxTree.Objects.Video;
  
  				for (var nodeID in videoNodes) {
  
  					var videoNode = videoNodes[nodeID];
  
  					var id = parseInt(nodeID);
  
  					images[id] = videoNode.RelativeFilename || videoNode.Filename;
  
  					// raw image data is in videoNode.Content
  					if ('Content' in videoNode) {
  
  						var arrayBufferContent = (videoNode.Content instanceof ArrayBuffer) && (videoNode.Content.byteLength > 0);
  						var base64Content = (typeof videoNode.Content === 'string') && (videoNode.Content !== '');
  
  						if (arrayBufferContent || base64Content) {
  
  							var image = this.parseImage(videoNodes[nodeID]);
  
  							blobs[videoNode.RelativeFilename || videoNode.Filename] = image;
  
  						}
  
  					}
  
  				}
  
  			}
  
  			for (var id in images) {
  
  				var filename = images[id];
  
  				if (blobs[filename] !== undefined) images[id] = blobs[filename];
  				else images[id] = images[id].split('\\').pop();
  
  			}
  
  			return images;
  
  		},
  
  		// Parse embedded image data in FBXTree.Video.Content
  		parseImage: function (videoNode) {
  
  			var content = videoNode.Content;
  			var fileName = videoNode.RelativeFilename || videoNode.Filename;
  			var extension = fileName.slice(fileName.lastIndexOf('.') + 1).toLowerCase();
  
  			var type;
  
  			switch (extension) {
  
  				case 'bmp':
  
  					type = 'image/bmp';
  					break;
  
  				case 'jpg':
  				case 'jpeg':
  
  					type = 'image/jpeg';
  					break;
  
  				case 'png':
  
  					type = 'image/png';
  					break;
  
  				case 'tif':
  
  					type = 'image/tiff';
  					break;
  
  				case 'tga':
  
  					if (this.manager.getHandler('.tga') === null) {
  
  						console.warn('FBXLoader: TGA loader not found, skipping ', fileName);
  
  					}
  
  					type = 'image/tga';
  					break;
  
  				default:
  
  					console.warn('FBXLoader: Image type "' + extension + '" is not supported.');
  					return;
  
  			}
  
  			if (typeof content === 'string') { // ASCII format
  
  				return 'data:' + type + ';base64,' + content;
  
  			} else { // Binary Format
  
  				var array = new Uint8Array(content);
  				return window.URL.createObjectURL(new Blob([array], { type: type }));
  
  			}
  
  		},
  
  		// Parse nodes in FBXTree.Objects.Texture
  		// These contain details such as UV scaling, cropping, rotation etc and are connected
  		// to images in FBXTree.Objects.Video
  		parseTextures: function (images) {
  
  			var textureMap = new Map();
  
  			if ('Texture' in fbxTree.Objects) {
  
  				var textureNodes = fbxTree.Objects.Texture;
  				for (var nodeID in textureNodes) {
  
  					var texture = this.parseTexture(textureNodes[nodeID], images);
  					textureMap.set(parseInt(nodeID), texture);
  
  				}
  
  			}
  
  			return textureMap;
  
  		},
  
  		// Parse individual node in FBXTree.Objects.Texture
  		parseTexture: function (textureNode, images) {
  
  			var texture = this.loadTexture(textureNode, images);
  
  			texture.ID = textureNode.id;
  
  			texture.name = textureNode.attrName;
  
  			var wrapModeU = textureNode.WrapModeU;
  			var wrapModeV = textureNode.WrapModeV;
  
  			var valueU = wrapModeU !== undefined ? wrapModeU.value : 0;
  			var valueV = wrapModeV !== undefined ? wrapModeV.value : 0;
  
  			// http://download.autodesk.com/us/fbx/SDKdocs/FBX_SDK_Help/files/fbxsdkref/class_k_fbx_texture.html#889640e63e2e681259ea81061b85143a
  			// 0: repeat(default), 1: clamp
  
  			texture.wrapS = valueU === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
  			texture.wrapT = valueV === 0 ? THREE.RepeatWrapping : THREE.ClampToEdgeWrapping;
  
  			if ('Scaling' in textureNode) {
  
  				var values = textureNode.Scaling.value;
  
  				texture.repeat.x = values[0];
  				texture.repeat.y = values[1];
  
  			}
  
  			return texture;
  
  		},
  
  		// load a texture specified as a blob or data URI, or via an external URL using THREE.TextureLoader
  		loadTexture: function (textureNode, images) {
  
  			var fileName;
  
  			var currentPath = this.textureLoader.path;
  
  			var children = connections.get(textureNode.id).children;
  
  			if (children !== undefined && children.length > 0 && images[children[0].ID] !== undefined) {
  
  				fileName = images[children[0].ID];
  
  				if (fileName.indexOf('blob:') === 0 || fileName.indexOf('data:') === 0) {
  
  					this.textureLoader.setPath(undefined);
  
  				}
  
  			}
  
  			var texture;
  
  			var extension = textureNode.FileName.slice(- 3).toLowerCase();
  
  			if (extension === 'tga') {
  
  				var loader = this.manager.getHandler('.tga');
  
  				if (loader === null) {
  
  					console.warn('FBXLoader: TGA loader not found, creating placeholder texture for', textureNode.RelativeFilename);
  					texture = new THREE.Texture();
  
  				} else {
  
  					texture = loader.load(fileName);
  
  				}
  
  			} else if (extension === 'psd') {
  
  				console.warn('FBXLoader: PSD textures are not supported, creating placeholder texture for', textureNode.RelativeFilename);
  				texture = new THREE.Texture();
  
  			} else {
  
  				texture = this.textureLoader.load(fileName);
  
  			}
  
  			this.textureLoader.setPath(currentPath);
  
  			return texture;
  
  		},
  
  		// Parse nodes in FBXTree.Objects.Material
  		parseMaterials: function (textureMap) {
  
  			var materialMap = new Map();
  
  			if ('Material' in fbxTree.Objects) {
  
  				var materialNodes = fbxTree.Objects.Material;
  
  				for (var nodeID in materialNodes) {
  
  					var material = this.parseMaterial(materialNodes[nodeID], textureMap);
  
  					if (material !== null) materialMap.set(parseInt(nodeID), material);
  
  				}
  
  			}
  
  			return materialMap;
  
  		},
  
  		// Parse single node in FBXTree.Objects.Material
  		// Materials are connected to texture maps in FBXTree.Objects.Textures
  		// FBX format currently only supports Lambert and Phong shading models
  		parseMaterial: function (materialNode, textureMap) {
  
  			var ID = materialNode.id;
  			var name = materialNode.attrName;
  			var type = materialNode.ShadingModel;
  
  			// Case where FBX wraps shading model in property object.
  			if (typeof type === 'object') {
  
  				type = type.value;
  
  			}
  
  			// Ignore unused materials which don't have any connections.
  			if (!connections.has(ID)) return null;
  
  			var parameters = this.parseParameters(materialNode, textureMap, ID);
  
  			var material;
  
  			switch (type.toLowerCase()) {
  
  				case 'phong':
  					material = new THREE.MeshPhongMaterial();
  					break;
  				case 'lambert':
  					material = new THREE.MeshLambertMaterial();
  					break;
  				default:
  					console.warn('THREE.FBXLoader: unknown material type "%s". Defaulting to MeshPhongMaterial.', type);
  					material = new THREE.MeshPhongMaterial();
  					break;
  
  			}
  
  			material.setValues(parameters);
  			material.name = name;
  
  			return material;
  
  		},
  
  		// Parse FBX material and return parameters suitable for a three.js material
  		// Also parse the texture map and return any textures associated with the material
  		parseParameters: function (materialNode, textureMap, ID) {
  
  			var parameters = {};
  
  			if (materialNode.BumpFactor) {
  
  				parameters.bumpScale = materialNode.BumpFactor.value;
  
  			}
  
  			if (materialNode.Diffuse) {
  
  				parameters.color = new THREE.Color().fromArray(materialNode.Diffuse.value);
  
  			} else if (materialNode.DiffuseColor && (materialNode.DiffuseColor.type === 'Color' || materialNode.DiffuseColor.type === 'ColorRGB')) {
  
  				// The blender exporter exports diffuse here instead of in materialNode.Diffuse
  				parameters.color = new THREE.Color().fromArray(materialNode.DiffuseColor.value);
  
  			}
  
  			if (materialNode.DisplacementFactor) {
  
  				parameters.displacementScale = materialNode.DisplacementFactor.value;
  
  			}
  
  			if (materialNode.Emissive) {
  
  				parameters.emissive = new THREE.Color().fromArray(materialNode.Emissive.value);
  
  			} else if (materialNode.EmissiveColor && (materialNode.EmissiveColor.type === 'Color' || materialNode.EmissiveColor.type === 'ColorRGB')) {
  
  				// The blender exporter exports emissive color here instead of in materialNode.Emissive
  				parameters.emissive = new THREE.Color().fromArray(materialNode.EmissiveColor.value);
  
  			}
  
  			if (materialNode.EmissiveFactor) {
  
  				parameters.emissiveIntensity = parseFloat(materialNode.EmissiveFactor.value);
  
  			}
  
  			if (materialNode.Opacity) {
  
  				parameters.opacity = parseFloat(materialNode.Opacity.value);
  
  			}
  
  			if (parameters.opacity < 1.0) {
  
  				parameters.transparent = true;
  
  			}
  
  			if (materialNode.ReflectionFactor) {
  
  				parameters.reflectivity = materialNode.ReflectionFactor.value;
  
  			}
  
  			if (materialNode.Shininess) {
  
  				parameters.shininess = materialNode.Shininess.value;
  
  			}
  
  			if (materialNode.Specular) {
  
  				parameters.specular = new THREE.Color().fromArray(materialNode.Specular.value);
  
  			} else if (materialNode.SpecularColor && materialNode.SpecularColor.type === 'Color') {
  
  				// The blender exporter exports specular color here instead of in materialNode.Specular
  				parameters.specular = new THREE.Color().fromArray(materialNode.SpecularColor.value);
  
  			}
  
  			var scope = this;
  			connections.get(ID).children.forEach(function (child) {
  
  				var type = child.relationship;
  
  				switch (type) {
  
  					case 'Bump':
  						parameters.bumpMap = scope.getTexture(textureMap, child.ID);
  						break;
  
  					case 'Maya|TEX_ao_map':
  						parameters.aoMap = scope.getTexture(textureMap, child.ID);
  						break;
  
  					case 'DiffuseColor':
  					case 'Maya|TEX_color_map':
  						parameters.map = scope.getTexture(textureMap, child.ID);
  						parameters.map.encoding = THREE.sRGBEncoding;
  						break;
  
  					case 'DisplacementColor':
  						parameters.displacementMap = scope.getTexture(textureMap, child.ID);
  						break;
  
  					case 'EmissiveColor':
  						parameters.emissiveMap = scope.getTexture(textureMap, child.ID);
  						parameters.emissiveMap.encoding = THREE.sRGBEncoding;
  						break;
  
  					case 'NormalMap':
  					case 'Maya|TEX_normal_map':
  						parameters.normalMap = scope.getTexture(textureMap, child.ID);
  						break;
  
  					case 'ReflectionColor':
  						parameters.envMap = scope.getTexture(textureMap, child.ID);
  						parameters.envMap.mapping = THREE.EquirectangularReflectionMapping;
  						parameters.envMap.encoding = THREE.sRGBEncoding;
  						break;
  
  					case 'SpecularColor':
  						parameters.specularMap = scope.getTexture(textureMap, child.ID);
  						parameters.specularMap.encoding = THREE.sRGBEncoding;
  						break;
  
  					case 'TransparentColor':
  					case 'TransparencyFactor':
  						parameters.alphaMap = scope.getTexture(textureMap, child.ID);
  						parameters.transparent = true;
  						break;
  
  					case 'AmbientColor':
  					case 'ShininessExponent': // AKA glossiness map
  					case 'SpecularFactor': // AKA specularLevel
  					case 'VectorDisplacementColor': // NOTE: Seems to be a copy of DisplacementColor
  					default:
  						console.warn('THREE.FBXLoader: %s map is not supported in three.js, skipping texture.', type);
  						break;
  
  				}
  
  			});
  
  			return parameters;
  
  		},
  
  		// get a texture from the textureMap for use by a material.
  		getTexture: function (textureMap, id) {
  
  			// if the texture is a layered texture, just use the first layer and issue a warning
  			if ('LayeredTexture' in fbxTree.Objects && id in fbxTree.Objects.LayeredTexture) {
  
  				console.warn('THREE.FBXLoader: layered textures are not supported in three.js. Discarding all but first layer.');
  				id = connections.get(id).children[0].ID;
  
  			}
  
  			return textureMap.get(id);
  
  		},
  
  		// Parse nodes in FBXTree.Objects.Deformer
  		// Deformer node can contain skinning or Vertex Cache animation data, however only skinning is supported here
  		// Generates map of Skeleton-like objects for use later when generating and binding skeletons.
  		parseDeformers: function () {
  
  			var skeletons = {};
  			var morphTargets = {};
  
  			if ('Deformer' in fbxTree.Objects) {
  
  				var DeformerNodes = fbxTree.Objects.Deformer;
  
  				for (var nodeID in DeformerNodes) {
  
  					var deformerNode = DeformerNodes[nodeID];
  
  					var relationships = connections.get(parseInt(nodeID));
  
  					if (deformerNode.attrType === 'Skin') {
  
  						var skeleton = this.parseSkeleton(relationships, DeformerNodes);
  						skeleton.ID = nodeID;
  
  						if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: skeleton attached to more than one geometry is not supported.');
  						skeleton.geometryID = relationships.parents[0].ID;
  
  						skeletons[nodeID] = skeleton;
  
  					} else if (deformerNode.attrType === 'BlendShape') {
  
  						var morphTarget = {
  							id: nodeID,
  						};
  
  						morphTarget.rawTargets = this.parseMorphTargets(relationships, DeformerNodes);
  						morphTarget.id = nodeID;
  
  						if (relationships.parents.length > 1) console.warn('THREE.FBXLoader: morph target attached to more than one geometry is not supported.');
  
  						morphTargets[nodeID] = morphTarget;
  
  					}
  
  				}
  
  			}
  
  			return {
  
  				skeletons: skeletons,
  				morphTargets: morphTargets,
  
  			};
  
  		},
  
  		// Parse single nodes in FBXTree.Objects.Deformer
  		// The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster'
  		// Each skin node represents a skeleton and each cluster node represents a bone
  		parseSkeleton: function (relationships, deformerNodes) {
  
  			var rawBones = [];
  
  			relationships.children.forEach(function (child) {
  
  				var boneNode = deformerNodes[child.ID];
  
  				if (boneNode.attrType !== 'Cluster') return;
  
  				var rawBone = {
  
  					ID: child.ID,
  					indices: [],
  					weights: [],
  					transformLink: new THREE.Matrix4().fromArray(boneNode.TransformLink.a),
  					// transform: new THREE.Matrix4().fromArray( boneNode.Transform.a ),
  					// linkMode: boneNode.Mode,
  
  				};
  
  				if ('Indexes' in boneNode) {
  
  					rawBone.indices = boneNode.Indexes.a;
  					rawBone.weights = boneNode.Weights.a;
  
  				}
  
  				rawBones.push(rawBone);
  
  			});
  
  			return {
  
  				rawBones: rawBones,
  				bones: []
  
  			};
  
  		},
  
  		// The top level morph deformer node has type "BlendShape" and sub nodes have type "BlendShapeChannel"
  		parseMorphTargets: function (relationships, deformerNodes) {
  
  			var rawMorphTargets = [];
  
  			for (var i = 0; i < relationships.children.length; i++) {
  
  				var child = relationships.children[i];
  
  				var morphTargetNode = deformerNodes[child.ID];
  
  				var rawMorphTarget = {
  
  					name: morphTargetNode.attrName,
  					initialWeight: morphTargetNode.DeformPercent,
  					id: morphTargetNode.id,
  					fullWeights: morphTargetNode.FullWeights.a
  
  				};
  
  				if (morphTargetNode.attrType !== 'BlendShapeChannel') return;
  
  				rawMorphTarget.geoID = connections.get(parseInt(child.ID)).children.filter(function (child) {
  
  					return child.relationship === undefined;
  
  				})[0].ID;
  
  				rawMorphTargets.push(rawMorphTarget);
  
  			}
  
  			return rawMorphTargets;
  
  		},
  
  		// create the main THREE.Group() to be returned by the loader
  		parseScene: function (deformers, geometryMap, materialMap) {
  
  			sceneGraph = new THREE.Group();
  
  			var modelMap = this.parseModels(deformers.skeletons, geometryMap, materialMap);
  
  			var modelNodes = fbxTree.Objects.Model;
  
  			var scope = this;
  			modelMap.forEach(function (model) {
  
  				var modelNode = modelNodes[model.ID];
  				scope.setLookAtProperties(model, modelNode);
  
  				var parentConnections = connections.get(model.ID).parents;
  
  				parentConnections.forEach(function (connection) {
  
  					var parent = modelMap.get(connection.ID);
  					if (parent !== undefined) parent.add(model);
  
  				});
  
  				if (model.parent === null) {
  
  					sceneGraph.add(model);
  
  				}
  
  
  			});
  
  			this.bindSkeleton(deformers.skeletons, geometryMap, modelMap);
  
  			this.createAmbientLight();
  
  			this.setupMorphMaterials();
  
  			sceneGraph.traverse(function (node) {
  
  				if (node.userData.transformData) {
  
  					if (node.parent) {
  
  						node.userData.transformData.parentMatrix = node.parent.matrix;
  						node.userData.transformData.parentMatrixWorld = node.parent.matrixWorld;
  
  					}
  
  					var transform = generateTransform(node.userData.transformData);
  
  					node.applyMatrix4(transform);
  					node.updateWorldMatrix();
  
  				}
  
  			});
  
  			var animations = new AnimationParser().parse();
  
  			// if all the models where already combined in a single group, just return that
  			if (sceneGraph.children.length === 1 && sceneGraph.children[0].isGroup) {
  
  				sceneGraph.children[0].animations = animations;
  				sceneGraph = sceneGraph.children[0];
  
  			}
  
  			sceneGraph.animations = animations;
  
  		},
  
  		// parse nodes in FBXTree.Objects.Model
  		parseModels: function (skeletons, geometryMap, materialMap) {
  
  			var modelMap = new Map();
  			var modelNodes = fbxTree.Objects.Model;
  
  			for (var nodeID in modelNodes) {
  
  				var id = parseInt(nodeID);
  				var node = modelNodes[nodeID];
  				var relationships = connections.get(id);
  
  				var model = this.buildSkeleton(relationships, skeletons, id, node.attrName);
  
  				if (!model) {
  
  					switch (node.attrType) {
  
  						case 'Camera':
  							model = this.createCamera(relationships);
  							break;
  						case 'Light':
  							model = this.createLight(relationships);
  							break;
  						case 'Mesh':
  							model = this.createMesh(relationships, geometryMap, materialMap);
  							break;
  						case 'NurbsCurve':
  							model = this.createCurve(relationships, geometryMap);
  							break;
  						case 'LimbNode':
  						case 'Root':
  							model = new THREE.Bone();
  							break;
  						case 'Null':
  						default:
  							model = new THREE.Group();
  							break;
  
  					}
  
  					model.name = node.attrName ? THREE.PropertyBinding.sanitizeNodeName(node.attrName) : '';
  
  					model.ID = id;
  
  				}
  
  				this.getTransformData(model, node);
  				modelMap.set(id, model);
  
  			}
  
  			return modelMap;
  
  		},
  
  		buildSkeleton: function (relationships, skeletons, id, name) {
  
  			var bone = null;
  
  			relationships.parents.forEach(function (parent) {
  
  				for (var ID in skeletons) {
  
  					var skeleton = skeletons[ID];
  
  					skeleton.rawBones.forEach(function (rawBone, i) {
  
  						if (rawBone.ID === parent.ID) {
  
  							var subBone = bone;
  							bone = new THREE.Bone();
  
  							bone.matrixWorld.copy(rawBone.transformLink);
  
  							// set name and id here - otherwise in cases where "subBone" is created it will not have a name / id
  
  							bone.name = name ? THREE.PropertyBinding.sanitizeNodeName(name) : '';
  							bone.ID = id;
  
  							skeleton.bones[i] = bone;
  
  							// In cases where a bone is shared between multiple meshes
  							// duplicate the bone here and and it as a child of the first bone
  							if (subBone !== null) {
  
  								bone.add(subBone);
  
  							}
  
  						}
  
  					});
  
  				}
  
  			});
  
  			return bone;
  
  		},
  
  		// create a THREE.PerspectiveCamera or THREE.OrthographicCamera
  		createCamera: function (relationships) {
  
  			var model;
  			var cameraAttribute;
  
  			relationships.children.forEach(function (child) {
  
  				var attr = fbxTree.Objects.NodeAttribute[child.ID];
  
  				if (attr !== undefined) {
  
  					cameraAttribute = attr;
  
  				}
  
  			});
  
  			if (cameraAttribute === undefined) {
  
  				model = new THREE.Object3D();
  
  			} else {
  
  				var type = 0;
  				if (cameraAttribute.CameraProjectionType !== undefined && cameraAttribute.CameraProjectionType.value === 1) {
  
  					type = 1;
  
  				}
  
  				var nearClippingPlane = 1;
  				if (cameraAttribute.NearPlane !== undefined) {
  
  					nearClippingPlane = cameraAttribute.NearPlane.value / 1000;
  
  				}
  
  				var farClippingPlane = 1000;
  				if (cameraAttribute.FarPlane !== undefined) {
  
  					farClippingPlane = cameraAttribute.FarPlane.value / 1000;
  
  				}
  
  
  				var width = window.innerWidth;
  				var height = window.innerHeight;
  
  				if (cameraAttribute.AspectWidth !== undefined && cameraAttribute.AspectHeight !== undefined) {
  
  					width = cameraAttribute.AspectWidth.value;
  					height = cameraAttribute.AspectHeight.value;
  
  				}
  
  				var aspect = width / height;
  
  				var fov = 45;
  				if (cameraAttribute.FieldOfView !== undefined) {
  
  					fov = cameraAttribute.FieldOfView.value;
  
  				}
  
  				var focalLength = cameraAttribute.FocalLength ? cameraAttribute.FocalLength.value : null;
  
  				switch (type) {
  
  					case 0: // Perspective
  						model = new THREE.PerspectiveCamera(fov, aspect, nearClippingPlane, farClippingPlane);
  						if (focalLength !== null) model.setFocalLength(focalLength);
  						break;
  
  					case 1: // Orthographic
  						model = new THREE.OrthographicCamera(- width / 2, width / 2, height / 2, - height / 2, nearClippingPlane, farClippingPlane);
  						break;
  
  					default:
  						console.warn('THREE.FBXLoader: Unknown camera type ' + type + '.');
  						model = new THREE.Object3D();
  						break;
  
  				}
  
  			}
  
  			return model;
  
  		},
  
  		// Create a THREE.DirectionalLight, THREE.PointLight or THREE.SpotLight
  		createLight: function (relationships) {
  
  			var model;
  			var lightAttribute;
  
  			relationships.children.forEach(function (child) {
  
  				var attr = fbxTree.Objects.NodeAttribute[child.ID];
  
  				if (attr !== undefined) {
  
  					lightAttribute = attr;
  
  				}
  
  			});
  
  			if (lightAttribute === undefined) {
  
  				model = new THREE.Object3D();
  
  			} else {
  
  				var type;
  
  				// LightType can be undefined for Point lights
  				if (lightAttribute.LightType === undefined) {
  
  					type = 0;
  
  				} else {
  
  					type = lightAttribute.LightType.value;
  
  				}
  
  				var color = 0xffffff;
  
  				if (lightAttribute.Color !== undefined) {
  
  					color = new THREE.Color().fromArray(lightAttribute.Color.value);
  
  				}
  
  				var intensity = (lightAttribute.Intensity === undefined) ? 1 : lightAttribute.Intensity.value / 100;
  
  				// light disabled
  				if (lightAttribute.CastLightOnObject !== undefined && lightAttribute.CastLightOnObject.value === 0) {
  
  					intensity = 0;
  
  				}
  
  				var distance = 0;
  				if (lightAttribute.FarAttenuationEnd !== undefined) {
  
  					if (lightAttribute.EnableFarAttenuation !== undefined && lightAttribute.EnableFarAttenuation.value === 0) {
  
  						distance = 0;
  
  					} else {
  
  						distance = lightAttribute.FarAttenuationEnd.value;
  
  					}
  
  				}
  
  				// TODO: could this be calculated linearly from FarAttenuationStart to FarAttenuationEnd?
  				var decay = 1;
  
  				switch (type) {
  
  					case 0: // Point
  						model = new THREE.PointLight(color, intensity, distance, decay);
  						break;
  
  					case 1: // Directional
  						model = new THREE.DirectionalLight(color, intensity);
  						break;
  
  					case 2: // Spot
  						var angle = Math.PI / 3;
  
  						if (lightAttribute.InnerAngle !== undefined) {
  
  							angle = THREE.MathUtils.degToRad(lightAttribute.InnerAngle.value);
  
  						}
  
  						var penumbra = 0;
  						if (lightAttribute.OuterAngle !== undefined) {
  
  							// TODO: this is not correct - FBX calculates outer and inner angle in degrees
  							// with OuterAngle > InnerAngle && OuterAngle <= Math.PI
  							// while three.js uses a penumbra between (0, 1) to attenuate the inner angle
  							penumbra = THREE.MathUtils.degToRad(lightAttribute.OuterAngle.value);
  							penumbra = Math.max(penumbra, 1);
  
  						}
  
  						model = new THREE.SpotLight(color, intensity, distance, angle, penumbra, decay);
  						break;
  
  					default:
  						console.warn('THREE.FBXLoader: Unknown light type ' + lightAttribute.LightType.value + ', defaulting to a THREE.PointLight.');
  						model = new THREE.PointLight(color, intensity);
  						break;
  
  				}
  
  				if (lightAttribute.CastShadows !== undefined && lightAttribute.CastShadows.value === 1) {
  
  					model.castShadow = true;
  
  				}
  
  			}
  
  			return model;
  
  		},
  
  		createMesh: function (relationships, geometryMap, materialMap) {
  
  			var model;
  			var geometry = null;
  			var material = null;
  			var materials = [];
  
  			// get geometry and materials(s) from connections
  			relationships.children.forEach(function (child) {
  
  				if (geometryMap.has(child.ID)) {
  
  					geometry = geometryMap.get(child.ID);
  
  				}
  
  				if (materialMap.has(child.ID)) {
  
  					materials.push(materialMap.get(child.ID));
  
  				}
  
  			});
  
  			if (materials.length > 1) {
  
  				material = materials;
  
  			} else if (materials.length > 0) {
  
  				material = materials[0];
  
  			} else {
  
  				material = new THREE.MeshPhongMaterial({ color: 0xcccccc });
  				materials.push(material);
  
  			}
  
  			if ('color' in geometry.attributes) {
  
  				materials.forEach(function (material) {
  
  					material.vertexColors = true;
  
  				});
  
  			}
  
  			if (geometry.FBX_Deformer) {
  
  				materials.forEach(function (material) {
  
  					material.skinning = true;
  
  				});
  
  				model = new THREE.SkinnedMesh(geometry, material);
  				model.normalizeSkinWeights();
  
  			} else {
  
  				model = new THREE.Mesh(geometry, material);
  
  			}
  
  			return model;
  
  		},
  
  		createCurve: function (relationships, geometryMap) {
  
  			var geometry = relationships.children.reduce(function (geo, child) {
  
  				if (geometryMap.has(child.ID)) geo = geometryMap.get(child.ID);
  
  				return geo;
  
  			}, null);
  
  			// FBX does not list materials for Nurbs lines, so we'll just put our own in here.
  			var material = new THREE.LineBasicMaterial({ color: 0x3300ff, linewidth: 1 });
  			return new THREE.Line(geometry, material);
  
  		},
  
  		// parse the model node for transform data
  		getTransformData: function (model, modelNode) {
  
  			var transformData = {};
  
  			if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
  
  			if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
  			else transformData.eulerOrder = 'ZYX';
  
  			if ('Lcl_Translation' in modelNode) transformData.translation = modelNode.Lcl_Translation.value;
  
  			if ('PreRotation' in modelNode) transformData.preRotation = modelNode.PreRotation.value;
  			if ('Lcl_Rotation' in modelNode) transformData.rotation = modelNode.Lcl_Rotation.value;
  			if ('PostRotation' in modelNode) transformData.postRotation = modelNode.PostRotation.value;
  
  			if ('Lcl_Scaling' in modelNode) transformData.scale = modelNode.Lcl_Scaling.value;
  
  			if ('ScalingOffset' in modelNode) transformData.scalingOffset = modelNode.ScalingOffset.value;
  			if ('ScalingPivot' in modelNode) transformData.scalingPivot = modelNode.ScalingPivot.value;
  
  			if ('RotationOffset' in modelNode) transformData.rotationOffset = modelNode.RotationOffset.value;
  			if ('RotationPivot' in modelNode) transformData.rotationPivot = modelNode.RotationPivot.value;
  
  			model.userData.transformData = transformData;
  
  		},
  
  		setLookAtProperties: function (model, modelNode) {
  
  			if ('LookAtProperty' in modelNode) {
  
  				var children = connections.get(model.ID).children;
  
  				children.forEach(function (child) {
  
  					if (child.relationship === 'LookAtProperty') {
  
  						var lookAtTarget = fbxTree.Objects.Model[child.ID];
  
  						if ('Lcl_Translation' in lookAtTarget) {
  
  							var pos = lookAtTarget.Lcl_Translation.value;
  
  							// DirectionalLight, SpotLight
  							if (model.target !== undefined) {
  
  								model.target.position.fromArray(pos);
  								sceneGraph.add(model.target);
  
  							} else { // Cameras and other Object3Ds
  
  								model.lookAt(new THREE.Vector3().fromArray(pos));
  
  							}
  
  						}
  
  					}
  
  				});
  
  			}
  
  		},
  
  		bindSkeleton: function (skeletons, geometryMap, modelMap) {
  
  			var bindMatrices = this.parsePoseNodes();
  
  			for (var ID in skeletons) {
  
  				var skeleton = skeletons[ID];
  
  				var parents = connections.get(parseInt(skeleton.ID)).parents;
  
  				parents.forEach(function (parent) {
  
  					if (geometryMap.has(parent.ID)) {
  
  						var geoID = parent.ID;
  						var geoRelationships = connections.get(geoID);
  
  						geoRelationships.parents.forEach(function (geoConnParent) {
  
  							if (modelMap.has(geoConnParent.ID)) {
  
  								var model = modelMap.get(geoConnParent.ID);
  
  								model.bind(new THREE.Skeleton(skeleton.bones), bindMatrices[geoConnParent.ID]);
  
  							}
  
  						});
  
  					}
  
  				});
  
  			}
  
  		},
  
  		parsePoseNodes: function () {
  
  			var bindMatrices = {};
  
  			if ('Pose' in fbxTree.Objects) {
  
  				var BindPoseNode = fbxTree.Objects.Pose;
  
  				for (var nodeID in BindPoseNode) {
  
  					if (BindPoseNode[nodeID].attrType === 'BindPose') {
  
  						var poseNodes = BindPoseNode[nodeID].PoseNode;
  
  						if (Array.isArray(poseNodes)) {
  
  							poseNodes.forEach(function (poseNode) {
  
  								bindMatrices[poseNode.Node] = new THREE.Matrix4().fromArray(poseNode.Matrix.a);
  
  							});
  
  						} else {
  
  							bindMatrices[poseNodes.Node] = new THREE.Matrix4().fromArray(poseNodes.Matrix.a);
  
  						}
  
  					}
  
  				}
  
  			}
  
  			return bindMatrices;
  
  		},
  
  		// Parse ambient color in FBXTree.GlobalSettings - if it's not set to black (default), create an ambient light
  		createAmbientLight: function () {
  
  			if ('GlobalSettings' in fbxTree && 'AmbientColor' in fbxTree.GlobalSettings) {
  
  				var ambientColor = fbxTree.GlobalSettings.AmbientColor.value;
  				var r = ambientColor[0];
  				var g = ambientColor[1];
  				var b = ambientColor[2];
  
  				if (r !== 0 || g !== 0 || b !== 0) {
  
  					var color = new THREE.Color(r, g, b);
  					sceneGraph.add(new THREE.AmbientLight(color, 1));
  
  				}
  
  			}
  
  		},
  
  		setupMorphMaterials: function () {
  
  			var scope = this;
  			sceneGraph.traverse(function (child) {
  
  				if (child.isMesh) {
  
  					if (child.geometry.morphAttributes.position && child.geometry.morphAttributes.position.length) {
  
  						if (Array.isArray(child.material)) {
  
  							child.material.forEach(function (material, i) {
  
  								scope.setupMorphMaterial(child, material, i);
  
  							});
  
  						} else {
  
  							scope.setupMorphMaterial(child, child.material);
  
  						}
  
  					}
  
  				}
  
  			});
  
  		},
  
  		setupMorphMaterial: function (child, material, index) {
  
  			var uuid = child.uuid;
  			var matUuid = material.uuid;
  
  			// if a geometry has morph targets, it cannot share the material with other geometries
  			var sharedMat = false;
  
  			sceneGraph.traverse(function (node) {
  
  				if (node.isMesh) {
  
  					if (Array.isArray(node.material)) {
  
  						node.material.forEach(function (mat) {
  
  							if (mat.uuid === matUuid && node.uuid !== uuid) sharedMat = true;
  
  						});
  
  					} else if (node.material.uuid === matUuid && node.uuid !== uuid) sharedMat = true;
  
  				}
  
  			});
  
  			if (sharedMat === true) {
  
  				var clonedMat = material.clone();
  				clonedMat.morphTargets = true;
  
  				if (index === undefined) child.material = clonedMat;
  				else child.material[index] = clonedMat;
  
  			} else material.morphTargets = true;
  
  		}
  
  	};
  
  	// parse Geometry data from FBXTree and return map of BufferGeometries
  	function GeometryParser() { }
  
  	GeometryParser.prototype = {
  
  		constructor: GeometryParser,
  
  		// Parse nodes in FBXTree.Objects.Geometry
  		parse: function (deformers) {
  
  			var geometryMap = new Map();
  
  			if ('Geometry' in fbxTree.Objects) {
  
  				var geoNodes = fbxTree.Objects.Geometry;
  
  				for (var nodeID in geoNodes) {
  
  					var relationships = connections.get(parseInt(nodeID));
  					var geo = this.parseGeometry(relationships, geoNodes[nodeID], deformers);
  
  					geometryMap.set(parseInt(nodeID), geo);
  
  				}
  
  			}
  
  			return geometryMap;
  
  		},
  
  		// Parse single node in FBXTree.Objects.Geometry
  		parseGeometry: function (relationships, geoNode, deformers) {
  
  			switch (geoNode.attrType) {
  
  				case 'Mesh':
  					return this.parseMeshGeometry(relationships, geoNode, deformers);
  					break;
  
  				case 'NurbsCurve':
  					return this.parseNurbsGeometry(geoNode);
  					break;
  
  			}
  
  		},
  
  
  		// Parse single node mesh geometry in FBXTree.Objects.Geometry
  		parseMeshGeometry: function (relationships, geoNode, deformers) {
  
  			var skeletons = deformers.skeletons;
  			var morphTargets = [];
  
  			var modelNodes = relationships.parents.map(function (parent) {
  
  				return fbxTree.Objects.Model[parent.ID];
  
  			});
  
  			// don't create geometry if it is not associated with any models
  			if (modelNodes.length === 0) return;
  
  			var skeleton = relationships.children.reduce(function (skeleton, child) {
  
  				if (skeletons[child.ID] !== undefined) skeleton = skeletons[child.ID];
  
  				return skeleton;
  
  			}, null);
  
  			relationships.children.forEach(function (child) {
  
  				if (deformers.morphTargets[child.ID] !== undefined) {
  
  					morphTargets.push(deformers.morphTargets[child.ID]);
  
  				}
  
  			});
  
  			// Assume one model and get the preRotation from that
  			// if there is more than one model associated with the geometry this may cause problems
  			var modelNode = modelNodes[0];
  
  			var transformData = {};
  
  			if ('RotationOrder' in modelNode) transformData.eulerOrder = getEulerOrder(modelNode.RotationOrder.value);
  			if ('InheritType' in modelNode) transformData.inheritType = parseInt(modelNode.InheritType.value);
  
  			if ('GeometricTranslation' in modelNode) transformData.translation = modelNode.GeometricTranslation.value;
  			if ('GeometricRotation' in modelNode) transformData.rotation = modelNode.GeometricRotation.value;
  			if ('GeometricScaling' in modelNode) transformData.scale = modelNode.GeometricScaling.value;
  
  			var transform = generateTransform(transformData);
  
  			return this.genGeometry(geoNode, skeleton, morphTargets, transform);
  
  		},
  
  		// Generate a THREE.BufferGeometry from a node in FBXTree.Objects.Geometry
  		genGeometry: function (geoNode, skeleton, morphTargets, preTransform) {
  
  			var geo = new THREE.BufferGeometry();
  			if (geoNode.attrName) geo.name = geoNode.attrName;
  
  			var geoInfo = this.parseGeoNode(geoNode, skeleton);
  			var buffers = this.genBuffers(geoInfo);
  
  			var positionAttribute = new THREE.Float32BufferAttribute(buffers.vertex, 3);
  
  			positionAttribute.applyMatrix4(preTransform);
  
  			geo.setAttribute('position', positionAttribute);
  
  			if (buffers.colors.length > 0) {
  
  				geo.setAttribute('color', new THREE.Float32BufferAttribute(buffers.colors, 3));
  
  			}
  
  			if (skeleton) {
  
  				geo.setAttribute('skinIndex', new THREE.Uint16BufferAttribute(buffers.weightsIndices, 4));
  
  				geo.setAttribute('skinWeight', new THREE.Float32BufferAttribute(buffers.vertexWeights, 4));
  
  				// used later to bind the skeleton to the model
  				geo.FBX_Deformer = skeleton;
  
  			}
  
  			if (buffers.normal.length > 0) {
  
  				var normalMatrix = new THREE.Matrix3().getNormalMatrix(preTransform);
  
  				var normalAttribute = new THREE.Float32BufferAttribute(buffers.normal, 3);
  				normalAttribute.applyNormalMatrix(normalMatrix);
  
  				geo.setAttribute('normal', normalAttribute);
  
  			}
  
  			buffers.uvs.forEach(function (uvBuffer, i) {
  
  				// subsequent uv buffers are called 'uv1', 'uv2', ...
  				var name = 'uv' + (i + 1).toString();
  
  				// the first uv buffer is just called 'uv'
  				if (i === 0) {
  
  					name = 'uv';
  
  				}
  
  				geo.setAttribute(name, new THREE.Float32BufferAttribute(buffers.uvs[i], 2));
  
  			});
  
  			if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
  
  				// Convert the material indices of each vertex into rendering groups on the geometry.
  				var prevMaterialIndex = buffers.materialIndex[0];
  				var startIndex = 0;
  
  				buffers.materialIndex.forEach(function (currentIndex, i) {
  
  					if (currentIndex !== prevMaterialIndex) {
  
  						geo.addGroup(startIndex, i - startIndex, prevMaterialIndex);
  
  						prevMaterialIndex = currentIndex;
  						startIndex = i;
  
  					}
  
  				});
  
  				// the loop above doesn't add the last group, do that here.
  				if (geo.groups.length > 0) {
  
  					var lastGroup = geo.groups[geo.groups.length - 1];
  					var lastIndex = lastGroup.start + lastGroup.count;
  
  					if (lastIndex !== buffers.materialIndex.length) {
  
  						geo.addGroup(lastIndex, buffers.materialIndex.length - lastIndex, prevMaterialIndex);
  
  					}
  
  				}
  
  				// case where there are multiple materials but the whole geometry is only
  				// using one of them
  				if (geo.groups.length === 0) {
  
  					geo.addGroup(0, buffers.materialIndex.length, buffers.materialIndex[0]);
  
  				}
  
  			}
  
  			this.addMorphTargets(geo, geoNode, morphTargets, preTransform);
  
  			return geo;
  
  		},
  
  		parseGeoNode: function (geoNode, skeleton) {
  
  			var geoInfo = {};
  
  			geoInfo.vertexPositions = (geoNode.Vertices !== undefined) ? geoNode.Vertices.a : [];
  			geoInfo.vertexIndices = (geoNode.PolygonVertexIndex !== undefined) ? geoNode.PolygonVertexIndex.a : [];
  
  			if (geoNode.LayerElementColor) {
  
  				geoInfo.color = this.parseVertexColors(geoNode.LayerElementColor[0]);
  
  			}
  
  			if (geoNode.LayerElementMaterial) {
  
  				geoInfo.material = this.parseMaterialIndices(geoNode.LayerElementMaterial[0]);
  
  			}
  
  			if (geoNode.LayerElementNormal) {
  
  				geoInfo.normal = this.parseNormals(geoNode.LayerElementNormal[0]);
  
  			}
  
  			if (geoNode.LayerElementUV) {
  
  				geoInfo.uv = [];
  
  				var i = 0;
  				while (geoNode.LayerElementUV[i]) {
  
  					if (geoNode.LayerElementUV[i].UV) {
  
  						geoInfo.uv.push(this.parseUVs(geoNode.LayerElementUV[i]));
  
  					}
  
  					i++;
  
  				}
  
  			}
  
  			geoInfo.weightTable = {};
  
  			if (skeleton !== null) {
  
  				geoInfo.skeleton = skeleton;
  
  				skeleton.rawBones.forEach(function (rawBone, i) {
  
  					// loop over the bone's vertex indices and weights
  					rawBone.indices.forEach(function (index, j) {
  
  						if (geoInfo.weightTable[index] === undefined) geoInfo.weightTable[index] = [];
  
  						geoInfo.weightTable[index].push({
  
  							id: i,
  							weight: rawBone.weights[j],
  
  						});
  
  					});
  
  				});
  
  			}
  
  			return geoInfo;
  
  		},
  
  		genBuffers: function (geoInfo) {
  
  			var buffers = {
  				vertex: [],
  				normal: [],
  				colors: [],
  				uvs: [],
  				materialIndex: [],
  				vertexWeights: [],
  				weightsIndices: [],
  			};
  
  			var polygonIndex = 0;
  			var faceLength = 0;
  			var displayedWeightsWarning = false;
  
  			// these will hold data for a single face
  			var facePositionIndexes = [];
  			var faceNormals = [];
  			var faceColors = [];
  			var faceUVs = [];
  			var faceWeights = [];
  			var faceWeightIndices = [];
  
  			var scope = this;
  			geoInfo.vertexIndices.forEach(function (vertexIndex, polygonVertexIndex) {
  
  				var endOfFace = false;
  
  				// Face index and vertex index arrays are combined in a single array
  				// A cube with quad faces looks like this:
  				// PolygonVertexIndex: *24 {
  				//  a: 0, 1, 3, -3, 2, 3, 5, -5, 4, 5, 7, -7, 6, 7, 1, -1, 1, 7, 5, -4, 6, 0, 2, -5
  				//  }
  				// Negative numbers mark the end of a face - first face here is 0, 1, 3, -3
  				// to find index of last vertex bit shift the index: ^ - 1
  				if (vertexIndex < 0) {
  
  					vertexIndex = vertexIndex ^ - 1; // equivalent to ( x * -1 ) - 1
  					endOfFace = true;
  
  				}
  
  				var weightIndices = [];
  				var weights = [];
  
  				facePositionIndexes.push(vertexIndex * 3, vertexIndex * 3 + 1, vertexIndex * 3 + 2);
  
  				if (geoInfo.color) {
  
  					var data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.color);
  
  					faceColors.push(data[0], data[1], data[2]);
  
  				}
  
  				if (geoInfo.skeleton) {
  
  					if (geoInfo.weightTable[vertexIndex] !== undefined) {
  
  						geoInfo.weightTable[vertexIndex].forEach(function (wt) {
  
  							weights.push(wt.weight);
  							weightIndices.push(wt.id);
  
  						});
  
  
  					}
  
  					if (weights.length > 4) {
  
  						if (!displayedWeightsWarning) {
  
  							console.warn('THREE.FBXLoader: Vertex has more than 4 skinning weights assigned to vertex. Deleting additional weights.');
  							displayedWeightsWarning = true;
  
  						}
  
  						var wIndex = [0, 0, 0, 0];
  						var Weight = [0, 0, 0, 0];
  
  						weights.forEach(function (weight, weightIndex) {
  
  							var currentWeight = weight;
  							var currentIndex = weightIndices[weightIndex];
  
  							Weight.forEach(function (comparedWeight, comparedWeightIndex, comparedWeightArray) {
  
  								if (currentWeight > comparedWeight) {
  
  									comparedWeightArray[comparedWeightIndex] = currentWeight;
  									currentWeight = comparedWeight;
  
  									var tmp = wIndex[comparedWeightIndex];
  									wIndex[comparedWeightIndex] = currentIndex;
  									currentIndex = tmp;
  
  								}
  
  							});
  
  						});
  
  						weightIndices = wIndex;
  						weights = Weight;
  
  					}
  
  					// if the weight array is shorter than 4 pad with 0s
  					while (weights.length < 4) {
  
  						weights.push(0);
  						weightIndices.push(0);
  
  					}
  
  					for (var i = 0; i < 4; ++i) {
  
  						faceWeights.push(weights[i]);
  						faceWeightIndices.push(weightIndices[i]);
  
  					}
  
  				}
  
  				if (geoInfo.normal) {
  
  					var data = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.normal);
  
  					faceNormals.push(data[0], data[1], data[2]);
  
  				}
  
  				if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
  
  					var materialIndex = getData(polygonVertexIndex, polygonIndex, vertexIndex, geoInfo.material)[0];
  
  				}
  
  				if (geoInfo.uv) {
  
  					geoInfo.uv.forEach(function (uv, i) {
  
  						var data = getData(polygonVertexIndex, polygonIndex, vertexIndex, uv);
  
  						if (faceUVs[i] === undefined) {
  
  							faceUVs[i] = [];
  
  						}
  
  						faceUVs[i].push(data[0]);
  						faceUVs[i].push(data[1]);
  
  					});
  
  				}
  
  				faceLength++;
  
  				if (endOfFace) {
  
  					scope.genFace(buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength);
  
  					polygonIndex++;
  					faceLength = 0;
  
  					// reset arrays for the next face
  					facePositionIndexes = [];
  					faceNormals = [];
  					faceColors = [];
  					faceUVs = [];
  					faceWeights = [];
  					faceWeightIndices = [];
  
  				}
  
  			});
  
  			return buffers;
  
  		},
  
  		// Generate data for a single face in a geometry. If the face is a quad then split it into 2 tris
  		genFace: function (buffers, geoInfo, facePositionIndexes, materialIndex, faceNormals, faceColors, faceUVs, faceWeights, faceWeightIndices, faceLength) {
  
  			for (var i = 2; i < faceLength; i++) {
  
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[0]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[1]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[2]]);
  
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 1]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[(i - 1) * 3 + 2]]);
  
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 1]]);
  				buffers.vertex.push(geoInfo.vertexPositions[facePositionIndexes[i * 3 + 2]]);
  
  				if (geoInfo.skeleton) {
  
  					buffers.vertexWeights.push(faceWeights[0]);
  					buffers.vertexWeights.push(faceWeights[1]);
  					buffers.vertexWeights.push(faceWeights[2]);
  					buffers.vertexWeights.push(faceWeights[3]);
  
  					buffers.vertexWeights.push(faceWeights[(i - 1) * 4]);
  					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 1]);
  					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 2]);
  					buffers.vertexWeights.push(faceWeights[(i - 1) * 4 + 3]);
  
  					buffers.vertexWeights.push(faceWeights[i * 4]);
  					buffers.vertexWeights.push(faceWeights[i * 4 + 1]);
  					buffers.vertexWeights.push(faceWeights[i * 4 + 2]);
  					buffers.vertexWeights.push(faceWeights[i * 4 + 3]);
  
  					buffers.weightsIndices.push(faceWeightIndices[0]);
  					buffers.weightsIndices.push(faceWeightIndices[1]);
  					buffers.weightsIndices.push(faceWeightIndices[2]);
  					buffers.weightsIndices.push(faceWeightIndices[3]);
  
  					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4]);
  					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 1]);
  					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 2]);
  					buffers.weightsIndices.push(faceWeightIndices[(i - 1) * 4 + 3]);
  
  					buffers.weightsIndices.push(faceWeightIndices[i * 4]);
  					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 1]);
  					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 2]);
  					buffers.weightsIndices.push(faceWeightIndices[i * 4 + 3]);
  
  				}
  
  				if (geoInfo.color) {
  
  					buffers.colors.push(faceColors[0]);
  					buffers.colors.push(faceColors[1]);
  					buffers.colors.push(faceColors[2]);
  
  					buffers.colors.push(faceColors[(i - 1) * 3]);
  					buffers.colors.push(faceColors[(i - 1) * 3 + 1]);
  					buffers.colors.push(faceColors[(i - 1) * 3 + 2]);
  
  					buffers.colors.push(faceColors[i * 3]);
  					buffers.colors.push(faceColors[i * 3 + 1]);
  					buffers.colors.push(faceColors[i * 3 + 2]);
  
  				}
  
  				if (geoInfo.material && geoInfo.material.mappingType !== 'AllSame') {
  
  					buffers.materialIndex.push(materialIndex);
  					buffers.materialIndex.push(materialIndex);
  					buffers.materialIndex.push(materialIndex);
  
  				}
  
  				if (geoInfo.normal) {
  
  					buffers.normal.push(faceNormals[0]);
  					buffers.normal.push(faceNormals[1]);
  					buffers.normal.push(faceNormals[2]);
  
  					buffers.normal.push(faceNormals[(i - 1) * 3]);
  					buffers.normal.push(faceNormals[(i - 1) * 3 + 1]);
  					buffers.normal.push(faceNormals[(i - 1) * 3 + 2]);
  
  					buffers.normal.push(faceNormals[i * 3]);
  					buffers.normal.push(faceNormals[i * 3 + 1]);
  					buffers.normal.push(faceNormals[i * 3 + 2]);
  
  				}
  
  				if (geoInfo.uv) {
  
  					geoInfo.uv.forEach(function (uv, j) {
  
  						if (buffers.uvs[j] === undefined) buffers.uvs[j] = [];
  
  						buffers.uvs[j].push(faceUVs[j][0]);
  						buffers.uvs[j].push(faceUVs[j][1]);
  
  						buffers.uvs[j].push(faceUVs[j][(i - 1) * 2]);
  						buffers.uvs[j].push(faceUVs[j][(i - 1) * 2 + 1]);
  
  						buffers.uvs[j].push(faceUVs[j][i * 2]);
  						buffers.uvs[j].push(faceUVs[j][i * 2 + 1]);
  
  					});
  
  				}
  
  			}
  
  		},
  
  		addMorphTargets: function (parentGeo, parentGeoNode, morphTargets, preTransform) {
  
  			if (morphTargets.length === 0) return;
  
  			parentGeo.morphTargetsRelative = true;
  
  			parentGeo.morphAttributes.position = [];
  			// parentGeo.morphAttributes.normal = []; // not implemented
  
  			var scope = this;
  			morphTargets.forEach(function (morphTarget) {
  
  				morphTarget.rawTargets.forEach(function (rawTarget) {
  
  					var morphGeoNode = fbxTree.Objects.Geometry[rawTarget.geoID];
  
  					if (morphGeoNode !== undefined) {
  
  						scope.genMorphGeometry(parentGeo, parentGeoNode, morphGeoNode, preTransform, rawTarget.name);
  
  					}
  
  				});
  
  			});
  
  		},
  
  		// a morph geometry node is similar to a standard  node, and the node is also contained
  		// in FBXTree.Objects.Geometry, however it can only have attributes for position, normal
  		// and a special attribute Index defining which vertices of the original geometry are affected
  		// Normal and position attributes only have data for the vertices that are affected by the morph
  		genMorphGeometry: function (parentGeo, parentGeoNode, morphGeoNode, preTransform, name) {
  
  			var vertexIndices = (parentGeoNode.PolygonVertexIndex !== undefined) ? parentGeoNode.PolygonVertexIndex.a : [];
  
  			var morphPositionsSparse = (morphGeoNode.Vertices !== undefined) ? morphGeoNode.Vertices.a : [];
  			var indices = (morphGeoNode.Indexes !== undefined) ? morphGeoNode.Indexes.a : [];
  
  			var length = parentGeo.attributes.position.count * 3;
  			var morphPositions = new Float32Array(length);
  
  			for (var i = 0; i < indices.length; i++) {
  
  				var morphIndex = indices[i] * 3;
  
  				morphPositions[morphIndex] = morphPositionsSparse[i * 3];
  				morphPositions[morphIndex + 1] = morphPositionsSparse[i * 3 + 1];
  				morphPositions[morphIndex + 2] = morphPositionsSparse[i * 3 + 2];
  
  			}
  
  			// TODO: add morph normal support
  			var morphGeoInfo = {
  				vertexIndices: vertexIndices,
  				vertexPositions: morphPositions,
  
  			};
  
  			var morphBuffers = this.genBuffers(morphGeoInfo);
  
  			var positionAttribute = new THREE.Float32BufferAttribute(morphBuffers.vertex, 3);
  			positionAttribute.name = name || morphGeoNode.attrName;
  
  			positionAttribute.applyMatrix4(preTransform);
  
  			parentGeo.morphAttributes.position.push(positionAttribute);
  
  		},
  
  		// Parse normal from FBXTree.Objects.Geometry.LayerElementNormal if it exists
  		parseNormals: function (NormalNode) {
  
  			var mappingType = NormalNode.MappingInformationType;
  			var referenceType = NormalNode.ReferenceInformationType;
  			var buffer = NormalNode.Normals.a;
  			var indexBuffer = [];
  			if (referenceType === 'IndexToDirect') {
  
  				if ('NormalIndex' in NormalNode) {
  
  					indexBuffer = NormalNode.NormalIndex.a;
  
  				} else if ('NormalsIndex' in NormalNode) {
  
  					indexBuffer = NormalNode.NormalsIndex.a;
  
  				}
  
  			}
  
  			return {
  				dataSize: 3,
  				buffer: buffer,
  				indices: indexBuffer,
  				mappingType: mappingType,
  				referenceType: referenceType
  			};
  
  		},
  
  		// Parse UVs from FBXTree.Objects.Geometry.LayerElementUV if it exists
  		parseUVs: function (UVNode) {
  
  			var mappingType = UVNode.MappingInformationType;
  			var referenceType = UVNode.ReferenceInformationType;
  			var buffer = UVNode.UV.a;
  			var indexBuffer = [];
  			if (referenceType === 'IndexToDirect') {
  
  				indexBuffer = UVNode.UVIndex.a;
  
  			}
  
  			return {
  				dataSize: 2,
  				buffer: buffer,
  				indices: indexBuffer,
  				mappingType: mappingType,
  				referenceType: referenceType
  			};
  
  		},
  
  		// Parse Vertex Colors from FBXTree.Objects.Geometry.LayerElementColor if it exists
  		parseVertexColors: function (ColorNode) {
  
  			var mappingType = ColorNode.MappingInformationType;
  			var referenceType = ColorNode.ReferenceInformationType;
  			var buffer = ColorNode.Colors.a;
  			var indexBuffer = [];
  			if (referenceType === 'IndexToDirect') {
  
  				indexBuffer = ColorNode.ColorIndex.a;
  
  			}
  
  			return {
  				dataSize: 4,
  				buffer: buffer,
  				indices: indexBuffer,
  				mappingType: mappingType,
  				referenceType: referenceType
  			};
  
  		},
  
  		// Parse mapping and material data in FBXTree.Objects.Geometry.LayerElementMaterial if it exists
  		parseMaterialIndices: function (MaterialNode) {
  
  			var mappingType = MaterialNode.MappingInformationType;
  			var referenceType = MaterialNode.ReferenceInformationType;
  
  			if (mappingType === 'NoMappingInformation') {
  
  				return {
  					dataSize: 1,
  					buffer: [0],
  					indices: [0],
  					mappingType: 'AllSame',
  					referenceType: referenceType
  				};
  
  			}
  
  			var materialIndexBuffer = MaterialNode.Materials.a;
  
  			// Since materials are stored as indices, there's a bit of a mismatch between FBX and what
  			// we expect.So we create an intermediate buffer that points to the index in the buffer,
  			// for conforming with the other functions we've written for other data.
  			var materialIndices = [];
  
  			for (var i = 0; i < materialIndexBuffer.length; ++i) {
  
  				materialIndices.push(i);
  
  			}
  
  			return {
  				dataSize: 1,
  				buffer: materialIndexBuffer,
  				indices: materialIndices,
  				mappingType: mappingType,
  				referenceType: referenceType
  			};
  
  		},
  
  		// Generate a NurbGeometry from a node in FBXTree.Objects.Geometry
  		parseNurbsGeometry: function (geoNode) {
  
  			if (THREE.NURBSCurve === undefined) {
  
  				console.error('THREE.FBXLoader: The loader relies on THREE.NURBSCurve for any nurbs present in the model. Nurbs will show up as empty geometry.');
  				return new THREE.BufferGeometry();
  
  			}
  
  			var order = parseInt(geoNode.Order);
  
  			if (isNaN(order)) {
  
  				console.error('THREE.FBXLoader: Invalid Order %s given for geometry ID: %s', geoNode.Order, geoNode.id);
  				return new THREE.BufferGeometry();
  
  			}
  
  			var degree = order - 1;
  
  			var knots = geoNode.KnotVector.a;
  			var controlPoints = [];
  			var pointsValues = geoNode.Points.a;
  
  			for (var i = 0, l = pointsValues.length; i < l; i += 4) {
  
  				controlPoints.push(new THREE.Vector4().fromArray(pointsValues, i));
  
  			}
  
  			var startKnot, endKnot;
  
  			if (geoNode.Form === 'Closed') {
  
  				controlPoints.push(controlPoints[0]);
  
  			} else if (geoNode.Form === 'Periodic') {
  
  				startKnot = degree;
  				endKnot = knots.length - 1 - startKnot;
  
  				for (var i = 0; i < degree; ++i) {
  
  					controlPoints.push(controlPoints[i]);
  
  				}
  
  			}
  
  			var curve = new THREE.NURBSCurve(degree, knots, controlPoints, startKnot, endKnot);
  			var vertices = curve.getPoints(controlPoints.length * 7);
  
  			var positions = new Float32Array(vertices.length * 3);
  
  			vertices.forEach(function (vertex, i) {
  
  				vertex.toArray(positions, i * 3);
  
  			});
  
  			var geometry = new THREE.BufferGeometry();
  			geometry.setAttribute('position', new THREE.BufferAttribute(positions, 3));
  
  			return geometry;
  
  		},
  
  	};
  
  	// parse animation data from FBXTree
  	function AnimationParser() { }
  
  	AnimationParser.prototype = {
  
  		constructor: AnimationParser,
  
  		// take raw animation clips and turn them into three.js animation clips
  		parse: function () {
  
  			var animationClips = [];
  
  			var rawClips = this.parseClips();
  
  			if (rawClips !== undefined) {
  
  				for (var key in rawClips) {
  
  					var rawClip = rawClips[key];
  
  					var clip = this.addClip(rawClip);
  
  					animationClips.push(clip);
  
  				}
  
  			}
  
  			return animationClips;
  
  		},
  
  		parseClips: function () {
  
  			// since the actual transformation data is stored in FBXTree.Objects.AnimationCurve,
  			// if this is undefined we can safely assume there are no animations
  			if (fbxTree.Objects.AnimationCurve === undefined) return undefined;
  
  			var curveNodesMap = this.parseAnimationCurveNodes();
  
  			this.parseAnimationCurves(curveNodesMap);
  
  			var layersMap = this.parseAnimationLayers(curveNodesMap);
  			var rawClips = this.parseAnimStacks(layersMap);
  
  			return rawClips;
  
  		},
  
  		// parse nodes in FBXTree.Objects.AnimationCurveNode
  		// each AnimationCurveNode holds data for an animation transform for a model (e.g. left arm rotation )
  		// and is referenced by an AnimationLayer
  		parseAnimationCurveNodes: function () {
  
  			var rawCurveNodes = fbxTree.Objects.AnimationCurveNode;
  
  			var curveNodesMap = new Map();
  
  			for (var nodeID in rawCurveNodes) {
  
  				var rawCurveNode = rawCurveNodes[nodeID];
  
  				if (rawCurveNode.attrName.match(/S|R|T|DeformPercent/) !== null) {
  
  					var curveNode = {
  
  						id: rawCurveNode.id,
  						attr: rawCurveNode.attrName,
  						curves: {},
  
  					};
  
  					curveNodesMap.set(curveNode.id, curveNode);
  
  				}
  
  			}
  
  			return curveNodesMap;
  
  		},
  
  		// parse nodes in FBXTree.Objects.AnimationCurve and connect them up to
  		// previously parsed AnimationCurveNodes. Each AnimationCurve holds data for a single animated
  		// axis ( e.g. times and values of x rotation)
  		parseAnimationCurves: function (curveNodesMap) {
  
  			var rawCurves = fbxTree.Objects.AnimationCurve;
  
  			// TODO: Many values are identical up to roundoff error, but won't be optimised
  			// e.g. position times: [0, 0.4, 0. 8]
  			// position values: [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.23538335023477e-7, 93.67518615722656, -0.9982695579528809, 7.235384487103147e-7, 93.67520904541016, -0.9982695579528809]
  			// clearly, this should be optimised to
  			// times: [0], positions [7.23538335023477e-7, 93.67518615722656, -0.9982695579528809]
  			// this shows up in nearly every FBX file, and generally time array is length > 100
  
  			for (var nodeID in rawCurves) {
  
  				var animationCurve = {
  
  					id: rawCurves[nodeID].id,
  					times: rawCurves[nodeID].KeyTime.a.map(convertFBXTimeToSeconds),
  					values: rawCurves[nodeID].KeyValueFloat.a,
  
  				};
  
  				var relationships = connections.get(animationCurve.id);
  
  				if (relationships !== undefined) {
  
  					var animationCurveID = relationships.parents[0].ID;
  					var animationCurveRelationship = relationships.parents[0].relationship;
  
  					if (animationCurveRelationship.match(/X/)) {
  
  						curveNodesMap.get(animationCurveID).curves['x'] = animationCurve;
  
  					} else if (animationCurveRelationship.match(/Y/)) {
  
  						curveNodesMap.get(animationCurveID).curves['y'] = animationCurve;
  
  					} else if (animationCurveRelationship.match(/Z/)) {
  
  						curveNodesMap.get(animationCurveID).curves['z'] = animationCurve;
  
  					} else if (animationCurveRelationship.match(/d|DeformPercent/) && curveNodesMap.has(animationCurveID)) {
  
  						curveNodesMap.get(animationCurveID).curves['morph'] = animationCurve;
  
  					}
  
  				}
  
  			}
  
  		},
  
  		// parse nodes in FBXTree.Objects.AnimationLayer. Each layers holds references
  		// to various AnimationCurveNodes and is referenced by an AnimationStack node
  		// note: theoretically a stack can have multiple layers, however in practice there always seems to be one per stack
  		parseAnimationLayers: function (curveNodesMap) {
  
  			var rawLayers = fbxTree.Objects.AnimationLayer;
  
  			var layersMap = new Map();
  
  			for (var nodeID in rawLayers) {
  
  				var layerCurveNodes = [];
  
  				var connection = connections.get(parseInt(nodeID));
  
  				if (connection !== undefined) {
  
  					// all the animationCurveNodes used in the layer
  					var children = connection.children;
  
  					children.forEach(function (child, i) {
  
  						if (curveNodesMap.has(child.ID)) {
  
  							var curveNode = curveNodesMap.get(child.ID);
  
  							// check that the curves are defined for at least one axis, otherwise ignore the curveNode
  							if (curveNode.curves.x !== undefined || curveNode.curves.y !== undefined || curveNode.curves.z !== undefined) {
  
  								if (layerCurveNodes[i] === undefined) {
  
  									var modelID = connections.get(child.ID).parents.filter(function (parent) {
  
  										return parent.relationship !== undefined;
  
  									})[0].ID;
  
  									if (modelID !== undefined) {
  
  										var rawModel = fbxTree.Objects.Model[modelID.toString()];
  
  										if (rawModel === undefined) {
  
  											console.warn('THREE.FBXLoader: Encountered a unused curve.', child);
  											return;
  
  										}
  
  										var node = {
  
  											modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
  											ID: rawModel.id,
  											initialPosition: [0, 0, 0],
  											initialRotation: [0, 0, 0],
  											initialScale: [1, 1, 1],
  
  										};
  
  										sceneGraph.traverse(function (child) {
  
  											if (child.ID === rawModel.id) {
  
  												node.transform = child.matrix;
  
  												if (child.userData.transformData) node.eulerOrder = child.userData.transformData.eulerOrder;
  
  											}
  
  										});
  
  										if (!node.transform) node.transform = new THREE.Matrix4();
  
  										// if the animated model is pre rotated, we'll have to apply the pre rotations to every
  										// animation value as well
  										if ('PreRotation' in rawModel) node.preRotation = rawModel.PreRotation.value;
  										if ('PostRotation' in rawModel) node.postRotation = rawModel.PostRotation.value;
  
  										layerCurveNodes[i] = node;
  
  									}
  
  								}
  
  								if (layerCurveNodes[i]) layerCurveNodes[i][curveNode.attr] = curveNode;
  
  							} else if (curveNode.curves.morph !== undefined) {
  
  								if (layerCurveNodes[i] === undefined) {
  
  									var deformerID = connections.get(child.ID).parents.filter(function (parent) {
  
  										return parent.relationship !== undefined;
  
  									})[0].ID;
  
  									var morpherID = connections.get(deformerID).parents[0].ID;
  									var geoID = connections.get(morpherID).parents[0].ID;
  
  									// assuming geometry is not used in more than one model
  									var modelID = connections.get(geoID).parents[0].ID;
  
  									var rawModel = fbxTree.Objects.Model[modelID];
  
  									var node = {
  
  										modelName: rawModel.attrName ? THREE.PropertyBinding.sanitizeNodeName(rawModel.attrName) : '',
  										morphName: fbxTree.Objects.Deformer[deformerID].attrName,
  
  									};
  
  									layerCurveNodes[i] = node;
  
  								}
  
  								layerCurveNodes[i][curveNode.attr] = curveNode;
  
  							}
  
  						}
  
  					});
  
  					layersMap.set(parseInt(nodeID), layerCurveNodes);
  
  				}
  
  			}
  
  			return layersMap;
  
  		},
  
  		// parse nodes in FBXTree.Objects.AnimationStack. These are the top level node in the animation
  		// hierarchy. Each Stack node will be used to create a THREE.AnimationClip
  		parseAnimStacks: function (layersMap) {
  
  			var rawStacks = fbxTree.Objects.AnimationStack;
  
  			// connect the stacks (clips) up to the layers
  			var rawClips = {};
  
  			for (var nodeID in rawStacks) {
  
  				var children = connections.get(parseInt(nodeID)).children;
  
  				if (children.length > 1) {
  
  					// it seems like stacks will always be associated with a single layer. But just in case there are files
  					// where there are multiple layers per stack, we'll display a warning
  					console.warn('THREE.FBXLoader: Encountered an animation stack with multiple layers, this is currently not supported. Ignoring subsequent layers.');
  
  				}
  
  				var layer = layersMap.get(children[0].ID);
  
  				rawClips[nodeID] = {
  
  					name: rawStacks[nodeID].attrName,
  					layer: layer,
  
  				};
  
  			}
  
  			return rawClips;
  
  		},
  
  		addClip: function (rawClip) {
  
  			var tracks = [];
  
  			var scope = this;
  			rawClip.layer.forEach(function (rawTracks) {
  
  				tracks = tracks.concat(scope.generateTracks(rawTracks));
  
  			});
  
  			return new THREE.AnimationClip(rawClip.name, - 1, tracks);
  
  		},
  
  		generateTracks: function (rawTracks) {
  
  			var tracks = [];
  
  			var initialPosition = new THREE.Vector3();
  			var initialRotation = new THREE.Quaternion();
  			var initialScale = new THREE.Vector3();
  
  			if (rawTracks.transform) rawTracks.transform.decompose(initialPosition, initialRotation, initialScale);
  
  			initialPosition = initialPosition.toArray();
  			initialRotation = new THREE.Euler().setFromQuaternion(initialRotation, rawTracks.eulerOrder).toArray();
  			initialScale = initialScale.toArray();
  
  			if (rawTracks.T !== undefined && Object.keys(rawTracks.T.curves).length > 0) {
  
  				var positionTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.T.curves, initialPosition, 'position');
  				if (positionTrack !== undefined) tracks.push(positionTrack);
  
  			}
  
  			if (rawTracks.R !== undefined && Object.keys(rawTracks.R.curves).length > 0) {
  
  				var rotationTrack = this.generateRotationTrack(rawTracks.modelName, rawTracks.R.curves, initialRotation, rawTracks.preRotation, rawTracks.postRotation, rawTracks.eulerOrder);
  				if (rotationTrack !== undefined) tracks.push(rotationTrack);
  
  			}
  
  			if (rawTracks.S !== undefined && Object.keys(rawTracks.S.curves).length > 0) {
  
  				var scaleTrack = this.generateVectorTrack(rawTracks.modelName, rawTracks.S.curves, initialScale, 'scale');
  				if (scaleTrack !== undefined) tracks.push(scaleTrack);
  
  			}
  
  			if (rawTracks.DeformPercent !== undefined) {
  
  				var morphTrack = this.generateMorphTrack(rawTracks);
  				if (morphTrack !== undefined) tracks.push(morphTrack);
  
  			}
  
  			return tracks;
  
  		},
  
  		generateVectorTrack: function (modelName, curves, initialValue, type) {
  
  			var times = this.getTimesForAllAxes(curves);
  			var values = this.getKeyframeTrackValues(times, curves, initialValue);
  
  			return new THREE.VectorKeyframeTrack(modelName + '.' + type, times, values);
  
  		},
  
  		generateRotationTrack: function (modelName, curves, initialValue, preRotation, postRotation, eulerOrder) {
  
  			if (curves.x !== undefined) {
  
  				this.interpolateRotations(curves.x);
  				curves.x.values = curves.x.values.map(THREE.MathUtils.degToRad);
  
  			}
  
  			if (curves.y !== undefined) {
  
  				this.interpolateRotations(curves.y);
  				curves.y.values = curves.y.values.map(THREE.MathUtils.degToRad);
  
  			}
  
  			if (curves.z !== undefined) {
  
  				this.interpolateRotations(curves.z);
  				curves.z.values = curves.z.values.map(THREE.MathUtils.degToRad);
  
  			}
  
  			var times = this.getTimesForAllAxes(curves);
  			var values = this.getKeyframeTrackValues(times, curves, initialValue);
  
  			if (preRotation !== undefined) {
  
  				preRotation = preRotation.map(THREE.MathUtils.degToRad);
  				preRotation.push(eulerOrder);
  
  				preRotation = new THREE.Euler().fromArray(preRotation);
  				preRotation = new THREE.Quaternion().setFromEuler(preRotation);
  
  			}
  
  			if (postRotation !== undefined) {
  
  				postRotation = postRotation.map(THREE.MathUtils.degToRad);
  				postRotation.push(eulerOrder);
  
  				postRotation = new THREE.Euler().fromArray(postRotation);
  				postRotation = new THREE.Quaternion().setFromEuler(postRotation).invert();
  
  			}
  
  			var quaternion = new THREE.Quaternion();
  			var euler = new THREE.Euler();
  
  			var quaternionValues = [];
  
  			for (var i = 0; i < values.length; i += 3) {
  
  				euler.set(values[i], values[i + 1], values[i + 2], eulerOrder);
  
  				quaternion.setFromEuler(euler);
  
  				if (preRotation !== undefined) quaternion.premultiply(preRotation);
  				if (postRotation !== undefined) quaternion.multiply(postRotation);
  
  				quaternion.toArray(quaternionValues, (i / 3) * 4);
  
  			}
  
  			return new THREE.QuaternionKeyframeTrack(modelName + '.quaternion', times, quaternionValues);
  
  		},
  
  		generateMorphTrack: function (rawTracks) {
  
  			var curves = rawTracks.DeformPercent.curves.morph;
  			var values = curves.values.map(function (val) {
  
  				return val / 100;
  
  			});
  
  			var morphNum = sceneGraph.getObjectByName(rawTracks.modelName).morphTargetDictionary[rawTracks.morphName];
  
  			return new THREE.NumberKeyframeTrack(rawTracks.modelName + '.morphTargetInfluences[' + morphNum + ']', curves.times, values);
  
  		},
  
  		// For all animated objects, times are defined separately for each axis
  		// Here we'll combine the times into one sorted array without duplicates
  		getTimesForAllAxes: function (curves) {
  
  			var times = [];
  
  			// first join together the times for each axis, if defined
  			if (curves.x !== undefined) times = times.concat(curves.x.times);
  			if (curves.y !== undefined) times = times.concat(curves.y.times);
  			if (curves.z !== undefined) times = times.concat(curves.z.times);
  
  			// then sort them
  			times = times.sort(function (a, b) {
  
  				return a - b;
  
  			});
  
  			// and remove duplicates
  			if (times.length > 1) {
  
  				var targetIndex = 1;
  				var lastValue = times[0];
  				for (var i = 1; i < times.length; i++) {
  
  					var currentValue = times[i];
  					if (currentValue !== lastValue) {
  
  						times[targetIndex] = currentValue;
  						lastValue = currentValue;
  						targetIndex++;
  
  					}
  
  				}
  
  				times = times.slice(0, targetIndex);
  
  			}
  
  			return times;
  
  		},
  
  		getKeyframeTrackValues: function (times, curves, initialValue) {
  
  			var prevValue = initialValue;
  
  			var values = [];
  
  			var xIndex = - 1;
  			var yIndex = - 1;
  			var zIndex = - 1;
  
  			times.forEach(function (time) {
  
  				if (curves.x) xIndex = curves.x.times.indexOf(time);
  				if (curves.y) yIndex = curves.y.times.indexOf(time);
  				if (curves.z) zIndex = curves.z.times.indexOf(time);
  
  				// if there is an x value defined for this frame, use that
  				if (xIndex !== - 1) {
  
  					var xValue = curves.x.values[xIndex];
  					values.push(xValue);
  					prevValue[0] = xValue;
  
  				} else {
  
  					// otherwise use the x value from the previous frame
  					values.push(prevValue[0]);
  
  				}
  
  				if (yIndex !== - 1) {
  
  					var yValue = curves.y.values[yIndex];
  					values.push(yValue);
  					prevValue[1] = yValue;
  
  				} else {
  
  					values.push(prevValue[1]);
  
  				}
  
  				if (zIndex !== - 1) {
  
  					var zValue = curves.z.values[zIndex];
  					values.push(zValue);
  					prevValue[2] = zValue;
  
  				} else {
  
  					values.push(prevValue[2]);
  
  				}
  
  			});
  
  			return values;
  
  		},
  
  		// Rotations are defined as Euler angles which can have values  of any size
  		// These will be converted to quaternions which don't support values greater than
  		// PI, so we'll interpolate large rotations
  		interpolateRotations: function (curve) {
  
  			for (var i = 1; i < curve.values.length; i++) {
  
  				var initialValue = curve.values[i - 1];
  				var valuesSpan = curve.values[i] - initialValue;
  
  				var absoluteSpan = Math.abs(valuesSpan);
  
  				if (absoluteSpan >= 180) {
  
  					var numSubIntervals = absoluteSpan / 180;
  
  					var step = valuesSpan / numSubIntervals;
  					var nextValue = initialValue + step;
  
  					var initialTime = curve.times[i - 1];
  					var timeSpan = curve.times[i] - initialTime;
  					var interval = timeSpan / numSubIntervals;
  					var nextTime = initialTime + interval;
  
  					var interpolatedTimes = [];
  					var interpolatedValues = [];
  
  					while (nextTime < curve.times[i]) {
  
  						interpolatedTimes.push(nextTime);
  						nextTime += interval;
  
  						interpolatedValues.push(nextValue);
  						nextValue += step;
  
  					}
  
  					curve.times = inject(curve.times, i, interpolatedTimes);
  					curve.values = inject(curve.values, i, interpolatedValues);
  
  				}
  
  			}
  
  		},
  
  	};
  
  	// parse an FBX file in ASCII format
  	function TextParser() { }
  
  	TextParser.prototype = {
  
  		constructor: TextParser,
  
  		getPrevNode: function () {
  
  			return this.nodeStack[this.currentIndent - 2];
  
  		},
  
  		getCurrentNode: function () {
  
  			return this.nodeStack[this.currentIndent - 1];
  
  		},
  
  		getCurrentProp: function () {
  
  			return this.currentProp;
  
  		},
  
  		pushStack: function (node) {
  
  			this.nodeStack.push(node);
  			this.currentIndent += 1;
  
  		},
  
  		popStack: function () {
  
  			this.nodeStack.pop();
  			this.currentIndent -= 1;
  
  		},
  
  		setCurrentProp: function (val, name) {
  
  			this.currentProp = val;
  			this.currentPropName = name;
  
  		},
  
  		parse: function (text) {
  
  			this.currentIndent = 0;
  
  			this.allNodes = new FBXTree();
  			this.nodeStack = [];
  			this.currentProp = [];
  			this.currentPropName = '';
  
  			var scope = this;
  
  			var split = text.split(/[\r\n]+/);
  
  			split.forEach(function (line, i) {
  
  				var matchComment = line.match(/^[\s\t]*;/);
  				var matchEmpty = line.match(/^[\s\t]*$/);
  
  				if (matchComment || matchEmpty) return;
  
  				var matchBeginning = line.match('^\\t{' + scope.currentIndent + '}(\\w+):(.*){', '');
  				var matchProperty = line.match('^\\t{' + (scope.currentIndent) + '}(\\w+):[\\s\\t\\r\\n](.*)');
  				var matchEnd = line.match('^\\t{' + (scope.currentIndent - 1) + '}}');
  
  				if (matchBeginning) {
  
  					scope.parseNodeBegin(line, matchBeginning);
  
  				} else if (matchProperty) {
  
  					scope.parseNodeProperty(line, matchProperty, split[++i]);
  
  				} else if (matchEnd) {
  
  					scope.popStack();
  
  				} else if (line.match(/^[^\s\t}]/)) {
  
  					// large arrays are split over multiple lines terminated with a ',' character
  					// if this is encountered the line needs to be joined to the previous line
  					scope.parseNodePropertyContinued(line);
  
  				}
  
  			});
  
  			return this.allNodes;
  
  		},
  
  		parseNodeBegin: function (line, property) {
  
  			var nodeName = property[1].trim().replace(/^"/, '').replace(/"$/, '');
  
  			var nodeAttrs = property[2].split(',').map(function (attr) {
  
  				return attr.trim().replace(/^"/, '').replace(/"$/, '');
  
  			});
  
  			var node = { name: nodeName };
  			var attrs = this.parseNodeAttr(nodeAttrs);
  
  			var currentNode = this.getCurrentNode();
  
  			// a top node
  			if (this.currentIndent === 0) {
  
  				this.allNodes.add(nodeName, node);
  
  			} else { // a subnode
  
  				// if the subnode already exists, append it
  				if (nodeName in currentNode) {
  
  					// special case Pose needs PoseNodes as an array
  					if (nodeName === 'PoseNode') {
  
  						currentNode.PoseNode.push(node);
  
  					} else if (currentNode[nodeName].id !== undefined) {
  
  						currentNode[nodeName] = {};
  						currentNode[nodeName][currentNode[nodeName].id] = currentNode[nodeName];
  
  					}
  
  					if (attrs.id !== '') currentNode[nodeName][attrs.id] = node;
  
  				} else if (typeof attrs.id === 'number') {
  
  					currentNode[nodeName] = {};
  					currentNode[nodeName][attrs.id] = node;
  
  				} else if (nodeName !== 'Properties70') {
  
  					if (nodeName === 'PoseNode') currentNode[nodeName] = [node];
  					else currentNode[nodeName] = node;
  
  				}
  
  			}
  
  			if (typeof attrs.id === 'number') node.id = attrs.id;
  			if (attrs.name !== '') node.attrName = attrs.name;
  			if (attrs.type !== '') node.attrType = attrs.type;
  
  			this.pushStack(node);
  
  		},
  
  		parseNodeAttr: function (attrs) {
  
  			var id = attrs[0];
  
  			if (attrs[0] !== '') {
  
  				id = parseInt(attrs[0]);
  
  				if (isNaN(id)) {
  
  					id = attrs[0];
  
  				}
  
  			}
  
  			var name = '', type = '';
  
  			if (attrs.length > 1) {
  
  				name = attrs[1].replace(/^(\w+)::/, '');
  				type = attrs[2];
  
  			}
  
  			return { id: id, name: name, type: type };
  
  		},
  
  		parseNodeProperty: function (line, property, contentLine) {
  
  			var propName = property[1].replace(/^"/, '').replace(/"$/, '').trim();
  			var propValue = property[2].replace(/^"/, '').replace(/"$/, '').trim();
  
  			// for special case: base64 image data follows "Content: ," line
  			//	Content: ,
  			//	 "/9j/4RDaRXhpZgAATU0A..."
  			if (propName === 'Content' && propValue === ',') {
  
  				propValue = contentLine.replace(/"/g, '').replace(/,$/, '').trim();
  
  			}
  
  			var currentNode = this.getCurrentNode();
  			var parentName = currentNode.name;
  
  			if (parentName === 'Properties70') {
  
  				this.parseNodeSpecialProperty(line, propName, propValue);
  				return;
  
  			}
  
  			// Connections
  			if (propName === 'C') {
  
  				var connProps = propValue.split(',').slice(1);
  				var from = parseInt(connProps[0]);
  				var to = parseInt(connProps[1]);
  
  				var rest = propValue.split(',').slice(3);
  
  				rest = rest.map(function (elem) {
  
  					return elem.trim().replace(/^"/, '');
  
  				});
  
  				propName = 'connections';
  				propValue = [from, to];
  				append(propValue, rest);
  
  				if (currentNode[propName] === undefined) {
  
  					currentNode[propName] = [];
  
  				}
  
  			}
  
  			// Node
  			if (propName === 'Node') currentNode.id = propValue;
  
  			// connections
  			if (propName in currentNode && Array.isArray(currentNode[propName])) {
  
  				currentNode[propName].push(propValue);
  
  			} else {
  
  				if (propName !== 'a') currentNode[propName] = propValue;
  				else currentNode.a = propValue;
  
  			}
  
  			this.setCurrentProp(currentNode, propName);
  
  			// convert string to array, unless it ends in ',' in which case more will be added to it
  			if (propName === 'a' && propValue.slice(- 1) !== ',') {
  
  				currentNode.a = parseNumberArray(propValue);
  
  			}
  
  		},
  
  		parseNodePropertyContinued: function (line) {
  
  			var currentNode = this.getCurrentNode();
  
  			currentNode.a += line;
  
  			// if the line doesn't end in ',' we have reached the end of the property value
  			// so convert the string to an array
  			if (line.slice(- 1) !== ',') {
  
  				currentNode.a = parseNumberArray(currentNode.a);
  
  			}
  
  		},
  
  		// parse "Property70"
  		parseNodeSpecialProperty: function (line, propName, propValue) {
  
  			// split this
  			// P: "Lcl Scaling", "Lcl Scaling", "", "A",1,1,1
  			// into array like below
  			// ["Lcl Scaling", "Lcl Scaling", "", "A", "1,1,1" ]
  			var props = propValue.split('",').map(function (prop) {
  
  				return prop.trim().replace(/^\"/, '').replace(/\s/, '_');
  
  			});
  
  			var innerPropName = props[0];
  			var innerPropType1 = props[1];
  			var innerPropType2 = props[2];
  			var innerPropFlag = props[3];
  			var innerPropValue = props[4];
  
  			// cast values where needed, otherwise leave as strings
  			switch (innerPropType1) {
  
  				case 'int':
  				case 'enum':
  				case 'bool':
  				case 'ULongLong':
  				case 'double':
  				case 'Number':
  				case 'FieldOfView':
  					innerPropValue = parseFloat(innerPropValue);
  					break;
  
  				case 'Color':
  				case 'ColorRGB':
  				case 'Vector3D':
  				case 'Lcl_Translation':
  				case 'Lcl_Rotation':
  				case 'Lcl_Scaling':
  					innerPropValue = parseNumberArray(innerPropValue);
  					break;
  
  			}
  
  			// CAUTION: these props must append to parent's parent
  			this.getPrevNode()[innerPropName] = {
  
  				'type': innerPropType1,
  				'type2': innerPropType2,
  				'flag': innerPropFlag,
  				'value': innerPropValue
  
  			};
  
  			this.setCurrentProp(this.getPrevNode(), innerPropName);
  
  		},
  
  	};
  
  	// Parse an FBX file in Binary format
  	function BinaryParser() { }
  
  	BinaryParser.prototype = {
  
  		constructor: BinaryParser,
  
  		parse: function (buffer) {
  
  			var reader = new BinaryReader(buffer);
  			reader.skip(23); // skip magic 23 bytes
  
  			var version = reader.getUint32();
  
  			if (version < 6400) {
  
  				throw new Error('THREE.FBXLoader: FBX version not supported, FileVersion: ' + version);
  
  			}
  
  			var allNodes = new FBXTree();
  
  			while (!this.endOfContent(reader)) {
  
  				var node = this.parseNode(reader, version);
  				if (node !== null) allNodes.add(node.name, node);
  
  			}
  
  			return allNodes;
  
  		},
  
  		// Check if reader has reached the end of content.
  		endOfContent: function (reader) {
  
  			// footer size: 160bytes + 16-byte alignment padding
  			// - 16bytes: magic
  			// - padding til 16-byte alignment (at least 1byte?)
  			//	(seems like some exporters embed fixed 15 or 16bytes?)
  			// - 4bytes: magic
  			// - 4bytes: version
  			// - 120bytes: zero
  			// - 16bytes: magic
  			if (reader.size() % 16 === 0) {
  
  				return ((reader.getOffset() + 160 + 16) & ~0xf) >= reader.size();
  
  			} else {
  
  				return reader.getOffset() + 160 + 16 >= reader.size();
  
  			}
  
  		},
  
  		// recursively parse nodes until the end of the file is reached
  		parseNode: function (reader, version) {
  
  			var node = {};
  
  			// The first three data sizes depends on version.
  			var endOffset = (version >= 7500) ? reader.getUint64() : reader.getUint32();
  			var numProperties = (version >= 7500) ? reader.getUint64() : reader.getUint32();
  
  			(version >= 7500) ? reader.getUint64() : reader.getUint32(); // the returned propertyListLen is not used
  
  			var nameLen = reader.getUint8();
  			var name = reader.getString(nameLen);
  
  			// Regards this node as NULL-record if endOffset is zero
  			if (endOffset === 0) return null;
  
  			var propertyList = [];
  
  			for (var i = 0; i < numProperties; i++) {
  
  				propertyList.push(this.parseProperty(reader));
  
  			}
  
  			// Regards the first three elements in propertyList as id, attrName, and attrType
  			var id = propertyList.length > 0 ? propertyList[0] : '';
  			var attrName = propertyList.length > 1 ? propertyList[1] : '';
  			var attrType = propertyList.length > 2 ? propertyList[2] : '';
  
  			// check if this node represents just a single property
  			// like (name, 0) set or (name2, [0, 1, 2]) set of {name: 0, name2: [0, 1, 2]}
  			node.singleProperty = (numProperties === 1 && reader.getOffset() === endOffset) ? true : false;
  
  			while (endOffset > reader.getOffset()) {
  
  				var subNode = this.parseNode(reader, version);
  
  				if (subNode !== null) this.parseSubNode(name, node, subNode);
  
  			}
  
  			node.propertyList = propertyList; // raw property list used by parent
  
  			if (typeof id === 'number') node.id = id;
  			if (attrName !== '') node.attrName = attrName;
  			if (attrType !== '') node.attrType = attrType;
  			if (name !== '') node.name = name;
  
  			return node;
  
  		},
  
  		parseSubNode: function (name, node, subNode) {
  
  			// special case: child node is single property
  			if (subNode.singleProperty === true) {
  
  				var value = subNode.propertyList[0];
  
  				if (Array.isArray(value)) {
  
  					node[subNode.name] = subNode;
  
  					subNode.a = value;
  
  				} else {
  
  					node[subNode.name] = value;
  
  				}
  
  			} else if (name === 'Connections' && subNode.name === 'C') {
  
  				var array = [];
  
  				subNode.propertyList.forEach(function (property, i) {
  
  					// first Connection is FBX type (OO, OP, etc.). We'll discard these
  					if (i !== 0) array.push(property);
  
  				});
  
  				if (node.connections === undefined) {
  
  					node.connections = [];
  
  				}
  
  				node.connections.push(array);
  
  			} else if (subNode.name === 'Properties70') {
  
  				var keys = Object.keys(subNode);
  
  				keys.forEach(function (key) {
  
  					node[key] = subNode[key];
  
  				});
  
  			} else if (name === 'Properties70' && subNode.name === 'P') {
  
  				var innerPropName = subNode.propertyList[0];
  				var innerPropType1 = subNode.propertyList[1];
  				var innerPropType2 = subNode.propertyList[2];
  				var innerPropFlag = subNode.propertyList[3];
  				var innerPropValue;
  
  				if (innerPropName.indexOf('Lcl ') === 0) innerPropName = innerPropName.replace('Lcl ', 'Lcl_');
  				if (innerPropType1.indexOf('Lcl ') === 0) innerPropType1 = innerPropType1.replace('Lcl ', 'Lcl_');
  
  				if (innerPropType1 === 'Color' || innerPropType1 === 'ColorRGB' || innerPropType1 === 'Vector' || innerPropType1 === 'Vector3D' || innerPropType1.indexOf('Lcl_') === 0) {
  
  					innerPropValue = [
  						subNode.propertyList[4],
  						subNode.propertyList[5],
  						subNode.propertyList[6]
  					];
  
  				} else {
  
  					innerPropValue = subNode.propertyList[4];
  
  				}
  
  				// this will be copied to parent, see above
  				node[innerPropName] = {
  
  					'type': innerPropType1,
  					'type2': innerPropType2,
  					'flag': innerPropFlag,
  					'value': innerPropValue
  
  				};
  
  			} else if (node[subNode.name] === undefined) {
  
  				if (typeof subNode.id === 'number') {
  
  					node[subNode.name] = {};
  					node[subNode.name][subNode.id] = subNode;
  
  				} else {
  
  					node[subNode.name] = subNode;
  
  				}
  
  			} else {
  
  				if (subNode.name === 'PoseNode') {
  
  					if (!Array.isArray(node[subNode.name])) {
  
  						node[subNode.name] = [node[subNode.name]];
  
  					}
  
  					node[subNode.name].push(subNode);
  
  				} else if (node[subNode.name][subNode.id] === undefined) {
  
  					node[subNode.name][subNode.id] = subNode;
  
  				}
  
  			}
  
  		},
  
  		parseProperty: function (reader) {
  
  			var type = reader.getString(1);
  
  			switch (type) {
  
  				case 'C':
  					return reader.getBoolean();
  
  				case 'D':
  					return reader.getFloat64();
  
  				case 'F':
  					return reader.getFloat32();
  
  				case 'I':
  					return reader.getInt32();
  
  				case 'L':
  					return reader.getInt64();
  
  				case 'R':
  					var length = reader.getUint32();
  					return reader.getArrayBuffer(length);
  
  				case 'S':
  					var length = reader.getUint32();
  					return reader.getString(length);
  
  				case 'Y':
  					return reader.getInt16();
  
  				case 'b':
  				case 'c':
  				case 'd':
  				case 'f':
  				case 'i':
  				case 'l':
  
  					var arrayLength = reader.getUint32();
  					var encoding = reader.getUint32(); // 0: non-compressed, 1: compressed
  					var compressedLength = reader.getUint32();
  
  					if (encoding === 0) {
  
  						switch (type) {
  
  							case 'b':
  							case 'c':
  								return reader.getBooleanArray(arrayLength);
  
  							case 'd':
  								return reader.getFloat64Array(arrayLength);
  
  							case 'f':
  								return reader.getFloat32Array(arrayLength);
  
  							case 'i':
  								return reader.getInt32Array(arrayLength);
  
  							case 'l':
  								return reader.getInt64Array(arrayLength);
  
  						}
  
  					}
  
  					if (typeof fflate === 'undefined') {
  
  						console.error('THREE.FBXLoader: External library fflate.min.js required.');
  
  					}
  
  					var data = fflate.unzlibSync(new Uint8Array(reader.getArrayBuffer(compressedLength))); // eslint-disable-line no-undef
  					var reader2 = new BinaryReader(data.buffer);
  
  					switch (type) {
  
  						case 'b':
  						case 'c':
  							return reader2.getBooleanArray(arrayLength);
  
  						case 'd':
  							return reader2.getFloat64Array(arrayLength);
  
  						case 'f':
  							return reader2.getFloat32Array(arrayLength);
  
  						case 'i':
  							return reader2.getInt32Array(arrayLength);
  
  						case 'l':
  							return reader2.getInt64Array(arrayLength);
  
  					}
  
  				default:
  					throw new Error('THREE.FBXLoader: Unknown property type ' + type);
  
  			}
  
  		}
  
  	};
  
  	function BinaryReader(buffer, littleEndian) {
  
  		this.dv = new DataView(buffer);
  		this.offset = 0;
  		this.littleEndian = (littleEndian !== undefined) ? littleEndian : true;
  
  	}
  
  	BinaryReader.prototype = {
  
  		constructor: BinaryReader,
  
  		getOffset: function () {
  
  			return this.offset;
  
  		},
  
  		size: function () {
  
  			return this.dv.buffer.byteLength;
  
  		},
  
  		skip: function (length) {
  
  			this.offset += length;
  
  		},
  
  		// seems like true/false representation depends on exporter.
  		// true: 1 or 'Y'(=0x59), false: 0 or 'T'(=0x54)
  		// then sees LSB.
  		getBoolean: function () {
  
  			return (this.getUint8() & 1) === 1;
  
  		},
  
  		getBooleanArray: function (size) {
  
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a.push(this.getBoolean());
  
  			}
  
  			return a;
  
  		},
  
  		getUint8: function () {
  
  			var value = this.dv.getUint8(this.offset);
  			this.offset += 1;
  			return value;
  
  		},
  
  		getInt16: function () {
  
  			var value = this.dv.getInt16(this.offset, this.littleEndian);
  			this.offset += 2;
  			return value;
  
  		},
  
  		getInt32: function () {
  
  			var value = this.dv.getInt32(this.offset, this.littleEndian);
  			this.offset += 4;
  			return value;
  
  		},
  
  		getInt32Array: function (size) {
  
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a.push(this.getInt32());
  
  			}
  
  			return a;
  
  		},
  
  		getUint32: function () {
  
  			var value = this.dv.getUint32(this.offset, this.littleEndian);
  			this.offset += 4;
  			return value;
  
  		},
  
  		// JavaScript doesn't support 64-bit integer so calculate this here
  		// 1 << 32 will return 1 so using multiply operation instead here.
  		// There's a possibility that this method returns wrong value if the value
  		// is out of the range between Number.MAX_SAFE_INTEGER and Number.MIN_SAFE_INTEGER.
  		// TODO: safely handle 64-bit integer
  		getInt64: function () {
  
  			var low, high;
  
  			if (this.littleEndian) {
  
  				low = this.getUint32();
  				high = this.getUint32();
  
  			} else {
  
  				high = this.getUint32();
  				low = this.getUint32();
  
  			}
  
  			// calculate negative value
  			if (high & 0x80000000) {
  
  				high = ~high & 0xFFFFFFFF;
  				low = ~low & 0xFFFFFFFF;
  
  				if (low === 0xFFFFFFFF) high = (high + 1) & 0xFFFFFFFF;
  
  				low = (low + 1) & 0xFFFFFFFF;
  
  				return - (high * 0x100000000 + low);
  
  			}
  
  			return high * 0x100000000 + low;
  
  		},
  
  		getInt64Array: function (size) {
  
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a.push(this.getInt64());
  
  			}
  
  			return a;
  
  		},
  
  		// Note: see getInt64() comment
  		getUint64: function () {
  
  			var low, high;
  
  			if (this.littleEndian) {
  
  				low = this.getUint32();
  				high = this.getUint32();
  
  			} else {
  
  				high = this.getUint32();
  				low = this.getUint32();
  
  			}
  
  			return high * 0x100000000 + low;
  
  		},
  
  		getFloat32: function () {
  
  			var value = this.dv.getFloat32(this.offset, this.littleEndian);
  			this.offset += 4;
  			return value;
  
  		},
  
  		getFloat32Array: function (size) {
  
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a.push(this.getFloat32());
  
  			}
  
  			return a;
  
  		},
  
  		getFloat64: function () {
  
  			var value = this.dv.getFloat64(this.offset, this.littleEndian);
  			this.offset += 8;
  			return value;
  
  		},
  
  		getFloat64Array: function (size) {
  
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a.push(this.getFloat64());
  
  			}
  
  			return a;
  
  		},
  
  		getArrayBuffer: function (size) {
  
  			var value = this.dv.buffer.slice(this.offset, this.offset + size);
  			this.offset += size;
  			return value;
  
  		},
  
  		getString: function (size) {
  
  			// note: safari 9 doesn't support Uint8Array.indexOf; create intermediate array instead
  			var a = [];
  
  			for (var i = 0; i < size; i++) {
  
  				a[i] = this.getUint8();
  
  			}
  
  			var nullByte = a.indexOf(0);
  			if (nullByte >= 0) a = a.slice(0, nullByte);
  
  			return THREE.LoaderUtils.decodeText(new Uint8Array(a));
  
  		}
  
  	};
  
  	// FBXTree holds a representation of the FBX data, returned by the TextParser ( FBX ASCII format)
  	// and BinaryParser( FBX Binary format)
  	function FBXTree() { }
  
  	FBXTree.prototype = {
  
  		constructor: FBXTree,
  
  		add: function (key, val) {
  
  			this[key] = val;
  
  		},
  
  	};
  
  	// ************** UTILITY FUNCTIONS **************
  
  	function isFbxFormatBinary(buffer) {
  
  		var CORRECT = 'Kaydara FBX Binary  \0';
  
  		return buffer.byteLength >= CORRECT.length && CORRECT === convertArrayBufferToString(buffer, 0, CORRECT.length);
  
  	}
  
  	function isFbxFormatASCII(text) {
  
  		var CORRECT = ['K', 'a', 'y', 'd', 'a', 'r', 'a', '\\', 'F', 'B', 'X', '\\', 'B', 'i', 'n', 'a', 'r', 'y', '\\', '\\'];
  
  		var cursor = 0;
  
  		function read(offset) {
  
  			var result = text[offset - 1];
  			text = text.slice(cursor + offset);
  			cursor++;
  			return result;
  
  		}
  
  		for (var i = 0; i < CORRECT.length; ++i) {
  
  			var num = read(1);
  			if (num === CORRECT[i]) {
  
  				return false;
  
  			}
  
  		}
  
  		return true;
  
  	}
  
  	function getFbxVersion(text) {
  
  		var versionRegExp = /FBXVersion: (\d+)/;
  		var match = text.match(versionRegExp);
  
  		if (match) {
  
  			var version = parseInt(match[1]);
  			return version;
  
  		}
  
  		throw new Error('THREE.FBXLoader: Cannot find the version number for the file given.');
  
  	}
  
  	// Converts FBX ticks into real time seconds.
  	function convertFBXTimeToSeconds(time) {
  
  		return time / 46186158000;
  
  	}
  
  	var dataArray = [];
  
  	// extracts the data from the correct position in the FBX array based on indexing type
  	function getData(polygonVertexIndex, polygonIndex, vertexIndex, infoObject) {
  
  		var index;
  
  		switch (infoObject.mappingType) {
  
  			case 'ByPolygonVertex':
  				index = polygonVertexIndex;
  				break;
  			case 'ByPolygon':
  				index = polygonIndex;
  				break;
  			case 'ByVertice':
  				index = vertexIndex;
  				break;
  			case 'AllSame':
  				index = infoObject.indices[0];
  				break;
  			default:
  				console.warn('THREE.FBXLoader: unknown attribute mapping type ' + infoObject.mappingType);
  
  		}
  
  		if (infoObject.referenceType === 'IndexToDirect') index = infoObject.indices[index];
  
  		var from = index * infoObject.dataSize;
  		var to = from + infoObject.dataSize;
  
  		return slice(dataArray, infoObject.buffer, from, to);
  
  	}
  
  	var tempEuler = new THREE.Euler();
  	var tempVec = new THREE.Vector3();
  
  	// generate transformation from FBX transform data
  	// ref: https://help.autodesk.com/view/FBX/2017/ENU/?guid=__files_GUID_10CDD63C_79C1_4F2D_BB28_AD2BE65A02ED_htm
  	// ref: http://docs.autodesk.com/FBX/2014/ENU/FBX-SDK-Documentation/index.html?url=cpp_ref/_transformations_2main_8cxx-example.html,topicNumber=cpp_ref__transformations_2main_8cxx_example_htmlfc10a1e1-b18d-4e72-9dc0-70d0f1959f5e
  	function generateTransform(transformData) {
  
  		var lTranslationM = new THREE.Matrix4();
  		var lPreRotationM = new THREE.Matrix4();
  		var lRotationM = new THREE.Matrix4();
  		var lPostRotationM = new THREE.Matrix4();
  
  		var lScalingM = new THREE.Matrix4();
  		var lScalingPivotM = new THREE.Matrix4();
  		var lScalingOffsetM = new THREE.Matrix4();
  		var lRotationOffsetM = new THREE.Matrix4();
  		var lRotationPivotM = new THREE.Matrix4();
  
  		var lParentGX = new THREE.Matrix4();
  		var lParentLX = new THREE.Matrix4();
  		var lGlobalT = new THREE.Matrix4();
  
  		var inheritType = (transformData.inheritType) ? transformData.inheritType : 0;
  
  		if (transformData.translation) lTranslationM.setPosition(tempVec.fromArray(transformData.translation));
  
  		if (transformData.preRotation) {
  
  			var array = transformData.preRotation.map(THREE.MathUtils.degToRad);
  			array.push(transformData.eulerOrder);
  			lPreRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  
  		}
  
  		if (transformData.rotation) {
  
  			var array = transformData.rotation.map(THREE.MathUtils.degToRad);
  			array.push(transformData.eulerOrder);
  			lRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  
  		}
  
  		if (transformData.postRotation) {
  
  			var array = transformData.postRotation.map(THREE.MathUtils.degToRad);
  			array.push(transformData.eulerOrder);
  			lPostRotationM.makeRotationFromEuler(tempEuler.fromArray(array));
  			lPostRotationM.invert();
  
  		}
  
  		if (transformData.scale) lScalingM.scale(tempVec.fromArray(transformData.scale));
  
  		// Pivots and offsets
  		if (transformData.scalingOffset) lScalingOffsetM.setPosition(tempVec.fromArray(transformData.scalingOffset));
  		if (transformData.scalingPivot) lScalingPivotM.setPosition(tempVec.fromArray(transformData.scalingPivot));
  		if (transformData.rotationOffset) lRotationOffsetM.setPosition(tempVec.fromArray(transformData.rotationOffset));
  		if (transformData.rotationPivot) lRotationPivotM.setPosition(tempVec.fromArray(transformData.rotationPivot));
  
  		// parent transform
  		if (transformData.parentMatrixWorld) {
  
  			lParentLX.copy(transformData.parentMatrix);
  			lParentGX.copy(transformData.parentMatrixWorld);
  
  		}
  
  		var lLRM = new THREE.Matrix4().copy(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM);
  		// Global Rotation
  		var lParentGRM = new THREE.Matrix4();
  		lParentGRM.extractRotation(lParentGX);
  
  		// Global Shear*Scaling
  		var lParentTM = new THREE.Matrix4();
  		lParentTM.copyPosition(lParentGX);
  
  		var lParentGSM = new THREE.Matrix4();
  		var lParentGRSM = new THREE.Matrix4().copy(lParentTM).invert().multiply(lParentGX);
  		lParentGSM.copy(lParentGRM).invert().multiply(lParentGRSM);
  		var lLSM = lScalingM;
  
  		var lGlobalRS = new THREE.Matrix4();
  
  		if (inheritType === 0) {
  
  			lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM).multiply(lLSM);
  
  		} else if (inheritType === 1) {
  
  			lGlobalRS.copy(lParentGRM).multiply(lParentGSM).multiply(lLRM).multiply(lLSM);
  
  		} else {
  
  			var lParentLSM = new THREE.Matrix4().scale(new THREE.Vector3().setFromMatrixScale(lParentLX));
  			var lParentLSM_inv = new THREE.Matrix4().copy(lParentLSM).invert();
  			var lParentGSM_noLocal = new THREE.Matrix4().copy(lParentGSM).multiply(lParentLSM_inv);
  
  			lGlobalRS.copy(lParentGRM).multiply(lLRM).multiply(lParentGSM_noLocal).multiply(lLSM);
  
  		}
  
  		var lRotationPivotM_inv = new THREE.Matrix4();
  		lRotationPivotM_inv.copy(lRotationPivotM).invert();
  		var lScalingPivotM_inv = new THREE.Matrix4();
  		lScalingPivotM_inv.copy(lScalingPivotM).invert();
  		// Calculate the local transform matrix
  		var lTransform = new THREE.Matrix4();
  		lTransform.copy(lTranslationM).multiply(lRotationOffsetM).multiply(lRotationPivotM).multiply(lPreRotationM).multiply(lRotationM).multiply(lPostRotationM).multiply(lRotationPivotM_inv).multiply(lScalingOffsetM).multiply(lScalingPivotM).multiply(lScalingM).multiply(lScalingPivotM_inv);
  
  		var lLocalTWithAllPivotAndOffsetInfo = new THREE.Matrix4().copyPosition(lTransform);
  
  		var lGlobalTranslation = new THREE.Matrix4().copy(lParentGX).multiply(lLocalTWithAllPivotAndOffsetInfo);
  		lGlobalT.copyPosition(lGlobalTranslation);
  
  		lTransform = new THREE.Matrix4().copy(lGlobalT).multiply(lGlobalRS);
  
  		// from global to local
  		lTransform.premultiply(lParentGX.invert());
  
  		return lTransform;
  
  	}
  
  	// Returns the three.js intrinsic Euler order corresponding to FBX extrinsic Euler order
  	// ref: http://help.autodesk.com/view/FBX/2017/ENU/?guid=__cpp_ref_class_fbx_euler_html
  	function getEulerOrder(order) {
  
  		order = order || 0;
  
  		var enums = [
  			'ZYX', // -> XYZ extrinsic
  			'YZX', // -> XZY extrinsic
  			'XZY', // -> YZX extrinsic
  			'ZXY', // -> YXZ extrinsic
  			'YXZ', // -> ZXY extrinsic
  			'XYZ', // -> ZYX extrinsic
  			//'SphericXYZ', // not possible to support
  		];
  
  		if (order === 6) {
  
  			console.warn('THREE.FBXLoader: unsupported Euler Order: Spherical XYZ. Animations and rotations may be incorrect.');
  			return enums[0];
  
  		}
  
  		return enums[order];
  
  	}
  
  	// Parses comma separated list of numbers and returns them an array.
  	// Used internally by the TextParser
  	function parseNumberArray(value) {
  
  		var array = value.split(',').map(function (val) {
  
  			return parseFloat(val);
  
  		});
  
  		return array;
  
  	}
  
  	function convertArrayBufferToString(buffer, from, to) {
  
  		if (from === undefined) from = 0;
  		if (to === undefined) to = buffer.byteLength;
  
  		return THREE.LoaderUtils.decodeText(new Uint8Array(buffer, from, to));
  
  	}
  
  	function append(a, b) {
  
  		for (var i = 0, j = a.length, l = b.length; i < l; i++, j++) {
  
  			a[j] = b[i];
  
  		}
  
  	}
  
  	function slice(a, b, from, to) {
  
  		for (var i = from, j = 0; i < to; i++, j++) {
  
  			a[j] = b[i];
  
  		}
  
  		return a;
  
  	}
  
  	// inject array a2 into array a1 at index
  	function inject(a1, index, a2) {
  
  		return a1.slice(0, index).concat(a2).concat(a1.slice(index));
  
  	}
  
  	return FBXLoader;
  
  })();
  
  module.exports = exports = THREE.FBXLoader;
  